Date
Lets you
work with dates and times.
Created by
The
Date
constructor:
new
Date()
new Date(milliseconds)
new Date(dateString)
new Date(yr_num, mo_num,
day_num
[,
hr_num, min_num, sec_num, ms_num])
Versions prior to JavaScript 1.3:
new
Date()
new Date(milliseconds)
new Date(dateString)
new Date(yr_num, mo_num, day_num[, hr_num,
min_num, sec_num])
Parameters
|
milliseconds
|
Integer value representing the number of
milliseconds since 1 January 1970 00:00:00.
|
|
dateString
|
String value representing a date. The string
should be in a format recognized by the Date.parse method.
|
yr_num, mo_num,
day_num
|
Integer values representing part of a date.
As an integer value, the month is represented by 0 to 11 with
0=January and 11=December.
|
hr_num, min_num,
sec_num, ms_num
|
Integer values representing part of a date.
|
Description
If you
supply no arguments, the constructor creates a Date object for today's
date and time according to local time. If you supply some arguments but
not others, the missing arguments are set to 0. If you supply any
arguments, you must supply at least the year, month, and day. You can
omit the hours, minutes, seconds, and milliseconds.
The date
is measured in milliseconds since midnight 01 January, 1970 UTC. A day
holds 86,400,000 milliseconds. The Date object range is
-100,000,000 days to 100,000,000 days relative to 01 January, 1970 UTC.
The
Date object
provides uniform behavior across platforms.
The
Date object
supports a number of UTC (universal) methods, as well as local time
methods. UTC, also known as Greenwich Mean Time (GMT), refers to the
time as set by the World Time Standard. The local time is the time
known to the computer where JavaScript is executed.
For
compatibility with millennium calculations (in other words, to take
into account the year 2000), you should always specify the year in
full; for example, use 1998, not 98. To assist you in specifying the
complete year, JavaScript includes the methods getFullYear,
setFullYear,
getFullUTCYear, and
setFullUTCYear.
The
following example returns the time elapsed between timeA and
timeB in
milliseconds.
timeA = new Date();
// Statements here to take some action.
timeB = new Date();
timeDifference = timeB - timeA;
Backward Compatibility
JavaScript 1.2 and earlier.
The
Date object
behaves as follows:
-
-
Dates prior to 1970 are not allowed.
-
JavaScript depends on platform-specific date
facilities and behavior; the behavior of the Date object varies from
platform to platform.
Property Summary
|
Property
|
Description
|
|
constructor
|
Specifies the function that creates an
object's prototype.
|
|
prototype
|
Allows the addition of properties to a
Date
object.
|
Method Summary
|
Method
|
Description
|
|
getDate
|
Returns the day of the month for the
specified date according to local time.
|
|
getDay
|
Returns the day of the week for the
specified date according to local time.
|
|
getFullYear
|
Returns the year of the specified date
according to local time.
|
|
getHours
|
Returns the hour in the specified date
according to local time.
|
|
getMilliseconds
|
Returns the milliseconds in the specified
date according to local time.
|
|
getMinutes
|
Returns the minutes in the specified date
according to local time.
|
|
getMonth
|
Returns the month in the specified date
according to local time.
|
|
getSeconds
|
Returns the seconds in the specified date
according to local time.
|
|
getTime
|
Returns the numeric value corresponding to
the time for the specified date according to local time.
|
|
getTimezoneOffset
|
Returns the time-zone offset in minutes for
the current locale.
|
|
getUTCDate
|
Returns the day (date) of the month in the
specified date according to universal time.
|
|
getUTCDay
|
Returns the day of the week in the specified
date according to universal time.
|
|
getUTCFullYear
|
Returns the year in the specified date
according to universal time.
|
|
getUTCHours
|
Returns the hours in the specified date
according to universal time.
|
|
getUTCMilliseconds
|
Returns the milliseconds in the specified
date according to universal time.
|
|
getUTCMinutes
|
Returns the minutes in the specified date
according to universal time.
|
|
getUTCMonth
|
Returns the month according in the specified
date according to universal time.
|
|
getUTCSeconds
|
Returns the seconds in the specified date
according to universal time.
|
|
getYear
|
Returns the year in the specified date
according to local time.
|
|
parse
|
Returns the number of milliseconds in a date
string since January 1, 1970, 00:00:00, local time.
|
|
setDate
|
Sets
the day of the month for a specified date according to local
time.
|
|
setFullYear
|
Sets
the full year for a specified date according to local time.
|
|
setHours
|
Sets
the hours for a specified date according to local time.
|
|
setMilliseconds
|
Sets
the milliseconds for a specified date according to local time.
|
|
setMinutes
|
Sets
the minutes for a specified date according to local time.
|
|
setMonth
|
Sets
the month for a specified date according to local time.
|
|
setSeconds
|
Sets
the seconds for a specified date according to local time.
|
|
setTime
|
Sets
the value of a Date object according to local time.
|
|
setUTCDate
|
Sets
the day of the month for a specified date according to universal
time.
|
|
setUTCFullYear
|
Sets
the full year for a specified date according to universal time.
|
|
setUTCHours
|
Sets
the hour for a specified date according to universal time.
|
|
setUTCMilliseconds
|
Sets
the milliseconds for a specified date according to universal
time.
|
|
setUTCMinutes
|
Sets
the minutes for a specified date according to universal time.
|
|
setUTCMonth
|
Sets
the month for a specified date according to universal time.
|
|
setUTCSeconds
|
Sets
the seconds for a specified date according to universal time.
|
|
setYear
|
Sets
the year for a specified date according to local time.
|
|
toGMTString
|
Converts a date to a string, using the
Internet GMT conventions.
|
|
toLocaleString
|
Converts a date to a string, using the
current locale's conventions.
|
|
toSource
|
Returns an object literal representing the
specified Date object; you can use this value to create a new
object. Overrides the Object.toSource method.
|
|
toString
|
Returns a string representing the specified
Date object. Overrides the Object.toString method.
|
|
toUTCString
|
Converts a date to a string, using the
universal time convention.
|
|
UTC
|
Returns the number of milliseconds in a
Date
object since January 1, 1970, 00:00:00, universal time.
|
|
valueOf
|
Returns the primitive value of a Date
object. Overrides the Object.valueOf method.
|
In
addition, this object inherits the watch and unwatch methods from Object.
Examples
The
following examples show several ways to assign dates:
today = new Date()
birthday = new Date("December 17, 1995 03:24:00")
birthday = new Date(95,11,17)
birthday = new Date(95,11,17,3,24,0)
constructor
Specifies
the function that creates an object's prototype. Note that the value of
this property is a reference to the function itself, not a string
containing the function's name.
|
Property of
|
Date
|
|
Implemented in
|
JavaScript 1.1, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Description
See
Object.constructor.
getDate
Returns
the day of the month for the specified date according to local
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
getDate()
Parameters
None
Description
The value
returned by getDate is an integer
between 1 and 31.
Examples
The second
statement below assigns the value 25 to the variable day, based on the value
of the Date
object Xmas95.
Xmas95 = new Date("December 25, 1995 23:15:00")
day = Xmas95.getDate()
See also
Date.getUTCDate,
Date.getUTCDay, Date.setDate
getDay
Returns
the day of the week for the specified date according to local
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
getDay()
Parameters
None
Description
The value
returned by getDay is an integer
corresponding to the day of the week: 0 for Sunday, 1 for Monday, 2 for
Tuesday, and so on.
Examples
The second
statement below assigns the value 1 to weekday, based on the
value of the Date object
Xmas95.
December 25, 1995, is a Monday.
Xmas95 = new Date("December 25, 1995 23:15:00")
weekday = Xmas95.getDay()
See also
Date.getUTCDay,
Date.setDate
getFullYear
Returns
the year of the specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
getFullYear()
Parameters
None
Description
The value
returned by getFullYear is an
absolute number. For dates between the years 1000 and 9999,
getFullYear
returns a four-digit number, for example, 1995. Use this function
to make sure a year is compliant with years after 2000.
Use this
method instead of the getYear method.
Examples
The
following example assigns the four-digit value of the current year to
the variable yr.
var
yr;
Today = new Date();
yr = Today.getFullYear();
See also
Date.getYear,
Date.getUTCFullYear , Date.setFullYear
getHours
Returns
the hour for the specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
getHours()
Parameters
None
Description
The value
returned by getHours is an integer
between 0 and 23.
Examples
The second
statement below assigns the value 23 to the variable hours, based on the value
of the Date
object Xmas95.
Xmas95 = new Date("December 25, 1995 23:15:00")
hours = Xmas95.getHours()
See also
Date.getUTCHours,
Date.setHours
getMilliseconds
Returns
the milliseconds in the specified date according to local
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
getMilliseconds()
Parameters
None
Description
The value
returned by getMilliseconds is a
number between 0 and 999.
Examples
The
following example assigns the milliseconds portion of the current time
to the variable ms.
var
ms;
Today = new Date();
ms = Today.getMilliseconds();
See also
Date.getUTCMilliseconds
, Date.setMilliseconds
getMinutes
Returns
the minutes in the specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
getMinutes()
Parameters
None
Description
The value
returned by getMinutes is an integer
between 0 and 59.
Examples
The second
statement below assigns the value 15 to the variable minutes, based on the
value of the Date object
Xmas95.
Xmas95 = new Date("December 25, 1995 23:15:00")
minutes = Xmas95.getMinutes()
See also
Date.getUTCMinutes,
Date.setMinutes
getMonth
Returns
the month in the specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
getMonth()
Parameters
None
Description
The value
returned by getMonth is an integer
between 0 and 11. 0 corresponds to January, 1 to February, and so on.
Examples
The second
statement below assigns the value 11 to the variable month, based on the value
of the Date
object Xmas95.
Xmas95 = new Date("December 25, 1995 23:15:00")
month = Xmas95.getMonth()
See also
Date.getUTCMonth,
Date.setMonth
getSeconds
Returns
the seconds in the current time according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
getSeconds()
Parameters
None
Description
The value
returned by getSeconds is an integer
between 0 and 59.
Examples
The second
statement below assigns the value 30 to the variable secs, based on the value
of the Date
object Xmas95.
Xmas95 = new Date("December 25, 1995 23:15:30")
secs = Xmas95.getSeconds()
See also
Date.getUTCSeconds,
Date.setSeconds
getTime
Returns
the numeric value corresponding to the time for the specified date
according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
getTime()
Parameters
None
Description
The value
returned by the getTime method is the
number of milliseconds since 1 January 1970 00:00:00. You can use this
method to help assign a date and time to another Date object.
Examples
The
following example assigns the date value of theBigDay to
sameAsBigDay:
theBigDay = new Date("July 1, 1999")
sameAsBigDay = new Date()
sameAsBigDay.setTime(theBigDay.getTime())
See also
Date.getUTCHours,
Date.setTime
getTimezoneOffset
Returns
the time-zone offset in minutes for the current locale.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
getTimezoneOffset()
Parameters
None
Description
The
time-zone offset is the difference between local time and Greenwich
Mean Time (GMT). Daylight savings time prevents this value from being a
constant.
Examples
x =
new Date()
currentTimeZoneOffsetInHours = x.getTimezoneOffset()/60
getUTCDate
Returns
the day (date) of the month in the specified date according to
universal time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
getUTCDate()
Parameters
None
Description
The value
returned by getUTCDate is an integer
between 1 and 31.
Examples
The
following example assigns the day portion of the current date to the
variable d.
var
d;
Today = new Date();
d = Today.getUTCDate();
See also
Date.getDate
, Date.getUTCDay , Date.setUTCDate
getUTCDay
Returns
the day of the week in the specified date according to universal
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
getUTCDay()
Parameters
None
Description
The value
returned by getUTCDay is an integer
corresponding to the day of the week: 0 for Sunday, 1 for Monday, 2 for
Tuesday, and so on.
Examples
The
following example assigns the weekday portion of the current date to
the variable ms.
var
weekday;
Today = new Date()
weekday = Today.getUTCDay()
See also
Date.getDay
, Date.getUTCDate , Date.setUTCDate
getUTCFullYear
Returns
the year in the specified date according to universal time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
getUTCFullYear()
Parameters
None
Description
The value
returned by getUTCFullYear is an
absolute number that is compliant with year-2000, for example, 1995.
Examples
The
following example assigns the four-digit value of the current year to
the variable yr.
var
yr;
Today = new Date();
yr = Today.getUTCFullYear();
See also
Date.getFullYear
, Date.setFullYear
getUTCHours
Returns
the hours in the specified date according to universal time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
getUTCHours()
Parameters
None
Description
The value
returned by getUTCHours is an integer
between 0 and 23.
Examples
The
following example assigns the hours portion of the current time to the
variable hrs.
var
hrs;
Today = new Date();
hrs = Today.getUTCHours();
See also
Date.getHours
, Date.setUTCHours
getUTCMilliseconds
Returns
the milliseconds in the specified date according to universal
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
getUTCMilliSeconds()
Parameters
None
Description
The value
returned by getUTCMilliseconds is an
integer between 0 and 999.
Examples
The
following example assigns the milliseconds portion of the current time
to the variable ms.
var
ms;
Today = new Date();
ms = Today.getUTCMilliseconds();
See also
Date.getMilliseconds
, Date.setUTCMilliseconds
getUTCMinutes
Returns
the minutes in the specified date according to universal
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
getUTCMinutes()
Parameters
None
Description
The value
returned by getUTCMinutes is an
integer between 0 and 59.
Examples
The
following example assigns the minutes portion of the current time to
the variable min.
var
min;
Today = new Date();
min = Today.getUTCMinutes();
See also
Date.getMinutes
, Date.setUTCMinutes
getUTCMonth
Returns
the month according in the specified date according to universal
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
getUTCMonth()
Parameters
None
Description
The value
returned by getUTCMonth is an integer
between 0 and 11 corresponding to the month. 0 for January, 1 for
February, 2 for March, and so on.
Examples
The
following example assigns the month portion of the current date to the
variable mon.
var
mon;
Today = new Date();
mon = Today.getUTCMonth();
See also
Date.getMonth
, Date.setUTCMonth
getUTCSeconds
Returns
the seconds in the specified date according to universal
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
getUTCSeconds()
Parameters
None
Description
The value
returned by getUTCSeconds is an
integer between 0 and 59.
Examples
The
following example assigns the seconds portion of the current time to
the variable sec.
var
sec;
Today = new Date();
sec = Today.getUTCSeconds();
See also
Date.getSeconds
, Date.setUTCSeconds
getYear
Returns
the year in the specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
JavaScript 1.3: deprecated; also,
getYear
returns the year minus 1900 regardless of the year
specified
|
|
ECMA version
|
ECMA-262
|
Syntax
getYear()
Parameters
None
Description
getYear
is no longer used and has been replaced by the getFullYear method.
The
getYear method
returns the year minus 1900; thus:
-
-
For years above 2000, the value returned by
getYear is
100 or greater. For example, if the year is 2026, getYear returns 126.
-
For years between and including 1900 and 1999,
the value returned by getYear is between 0
and 99. For example, if the year is 1976, getYear returns 76.
-
For years less than 1900 or greater than 1999,
the value returned by getYear is less than 0.
For example, if the year is 1800, getYear returns -100.
To take into
account years before and after 2000, you should use Date.getFullYear instead of getYear so that the year is
specified in full.
Backward Compatibility
JavaScript 1.2 and earlier versions.
The
getYear method
returns either a 2-digit or 4-digit year:
-
-
For years between and including 1900 and 1999,
the value returned by getYear is the year
minus 1900. For example, if the year is 1976, the value returned is
76.
-
For years less than 1900 or greater than 1999,
the value returned by getYear is the
four-digit year. For example, if the year is 1856, the value returned
is 1856. If the year is 2026, the value returned is 2026.
Examples
Example
1. The second statement assigns the value 95 to the variable
year.
Xmas = new Date("December 25, 1995 23:15:00")
year = Xmas.getYear() // returns 95
Example
2. The second statement assigns the value 100 to the variable
year.
Xmas = new Date("December 25, 2000 23:15:00")
year = Xmas.getYear() // returns 100
Example
3. The second statement assigns the value -100 to the variable
year.
Xmas = new Date("December 25, 1800 23:15:00")
year = Xmas.getYear() // returns -100
Example
4. The second statement assigns the value 95 to the variable
year,
representing the year 1995.
Xmas.setYear(95)
year = Xmas.getYear() // returns 95
See also
Date.getFullYear,
Date.getUTCFullYear, Date.setYear
parse
Returns
the number of milliseconds in a date string since January 1, 1970,
00:00:00, local time.
|
Method of
|
Date
|
|
Static
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
Date.parse(dateString)
Parameters
:
|
dateString
|
A
string representing a date.
|
Description
The
parse method
takes a date string (such as "Dec 25, 1995") and
returns the number of milliseconds since January 1, 1970, 00:00:00
(local time). This function is useful for setting date values based on
string values, for example in conjunction with the setTime method and the Date object.
Given a
string representing a time, parse returns the time
value. It accepts the IETF standard date syntax: "Mon, 25 Dec 1995 13:30:00
GMT". It understands the continental US time-zone abbreviations,
but for general use, use a time-zone offset, for example,
"Mon, 25 Dec
1995 13:30:00 GMT+0430" (4 hours, 30 minutes west of the
Greenwich meridian). If you do not specify a time zone, the local
time zone is assumed. GMT and UTC are considered equivalent.
Because
parse is a
static method of Date, you always use it
as Date.parse(), rather than
as a method of a Date object you created.
Examples
If
IPOdate is an
existing Date
object, then you can set it to August 9, 1995 as follows:
IPOdate.setTime(Date.parse("Aug 9, 1995"))
See also
Date.UTC
prototype
Represents
the prototype for this class. You can use the prototype to add
properties or methods to all instances of a class. For information on
prototypes, see Function.prototype.
|
Property of
|
Date
|
|
Implemented in
|
JavaScript 1.1, NES 2.0
|
|
ECMA version
|
ECMA-262
|
setDate
Sets the
day of the month for a specified date according to local
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
setDate(dayValue)
Parameters
|
dayValue
|
An
integer from 1 to 31, representing the day of the month.
|
Examples
The second
statement below changes the day for theBigDay to July 24 from
its original value.
theBigDay = new Date("July 27, 1962 23:30:00")
theBigDay.setDate(24)
See also
Date.getDate,
Date.setUTCDate
setFullYear
Sets the
full year for a specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
setFullYear(yearValue[, monthValue,
dayValue])
Parameters
|
yearValue
|
An
integer specifying the numeric value of the year, for example,
1995.
|
|
monthValue
|
An
integer between 0 and 11 representing the months January through
December.
|
|
dayValue
|
An
integer between 1 and 31 representing the day of the month. If
you specify the dayValue parameter,
you must also specify the monthValue.
|
Description
If you do
not specify the monthValue and
dayValue
parameters, the values returned from the getMonth and
getDate
methods are used.
If a
parameter you specify is outside of the expected range,
setFullYear
attempts to update the other parameters and the date information
in the Date object
accordingly. For example, if you specify 15 for monthValue, the
year is incremented by 1 (year + 1), and 3 is used for the month.
Examples
theBigDay = new Date();
theBigDay.setFullYear(1997);
See also
Date.getUTCFullYear
,Date.setUTCFullYear, Date.setYear
setHours
Sets the
hours for a specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
JavaScript 1.3: Added minutesValue,
secondsValue, and
msValue
parameters.
|
|
ECMA version
|
ECMA-262
|
Syntax
setHours(hoursValue[, minutesValue,
secondsValue, msValue])
Versions prior to JavaScript 1.3:
setHours(hoursValue)
Parameters
|
hoursValue
|
An
integer between 0 and 23, representing the hour.
|
|
minutesValue
|
An
integer between 0 and 59, representing the minutes.
|
|
secondsValue
|
An
integer between 0 and 59, representing the seconds. If you
specify the secondsValue
parameter, you must also specify the minutesValue.
|
|
msValue
|
A
number between 0 and 999, representing the milliseconds. If you
specify the msValue parameter,
you must also specify the minutesValue and
secondsValue.
|
Description
If you do
not specify the minutesValue,
secondsValue,
and msValue parameters,
the values returned from the getUTCMinutes,
getUTCSeconds, and
getMilliseconds
methods are used.
If a
parameter you specify is outside of the expected range,
setHours
attempts to update the date information in the Date object
accordingly. For example, if you use 100 for secondsValue, the
minutes will be incremented by 1 (min + 1), and 40 will be used
for seconds.
Examples
theBigDay.setHours(7)
See also
Date.getHours,
Date.setUTCHours
setMilliseconds
Sets the
milliseconds for a specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
setMilliseconds(millisecondsValue)
Parameters
|
millisecondsValue
|
A
number between 0 and 999, representing the milliseconds.
|
Description
If you
specify a number outside the expected range, the date information in
the Date
object is updated accordingly. For example, if you specify 1005, the
number of seconds is incremented by 1, and 5 is used for the
milliseconds.
Examples
theBigDay = new Date();
theBigDay.setMilliseconds(100);
See also
Date.getMilliseconds
, Date.setUTCMilliseconds
setMinutes
Sets the
minutes for a specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
JavaScript 1.3: Added secondsValue and
msValue
parameters.
|
|
ECMA version
|
ECMA-262
|
Syntax
setMinutes(minutesValue[,
secondsValue, msValue])
Versions prior to JavaScript 1.3:
setMinutes(minutesValue)
Parameters
|
minutesValue
|
An
integer between 0 and 59, representing the minutes.
|
|
secondsValue
|
An
integer between 0 and 59, representing the seconds. If you
specify the secondsValue
parameter, you must also specify the minutesValue.
|
|
msValue
|
A
number between 0 and 999, representing the milliseconds. If you
specify the msValue parameter,
you must also specify the minutesValue and
secondsValue.
|
Examples
theBigDay.setMinutes(45)
Description
If you do
not specify the secondsValue and
msValue
parameters, the values returned from getSeconds and
getMilliseconds
methods are used.
If a
parameter you specify is outside of the expected range,
setMinutes
attempts to update the date information in the Date object
accordingly. For example, if you use 100 for secondsValue, the
minutes (minutesValue) will
be incremented by 1 (minutesValue + 1),
and 40 will be used for seconds.
See also
Date.getMinutes,
Date.setUTCMilliseconds
setMonth
Sets the
month for a specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
JavaScript 1.3: Added dayValue parameter.
|
|
ECMA version
|
ECMA-262
|
Syntax
setMonth(monthValue[, dayValue])
Versions prior to JavaScript 1.3:
setMonth(monthValue)
Parameters
|
monthValue
|
An
integer between 0 and 11 (representing the months January through
December).
|
|
dayValue
|
An
integer from 1 to 31, representing the day of the month.
|
Description
If you do
not specify the dayValue parameter, the
value returned from the getDate method is used.
If a
parameter you specify is outside of the expected range,
setMonth
attempts to update the date information in the Date object
accordingly. For example, if you use 15 for monthValue, the
year will be incremented by 1 (year + 1), and 3 will be used for
month.
Examples
theBigDay.setMonth(6)
See also
Date.getMonth,
Date.setUTCMonth
setSeconds
Sets the
seconds for a specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
JavaScript 1.3: Added msValue parameter.
|
|
ECMA version
|
ECMA-262
|
Syntax
setSeconds(secondsValue[, msValue])
Versions prior to JavaScript 1.3:
setSeconds(secondsValue)
Parameters
|
secondsValue
|
An
integer between 0 and 59.
|
|
msValue
|
A
number between 0 and 999, representing the milliseconds.
|
Description
If you do
not specify the msValue parameter, the
value returned from the getMilliseconds methods
is used.
If a
parameter you specify is outside of the expected range,
setSeconds
attempts to update the date information in the Date object
accordingly. For example, if you use 100 for secondsValue, the
minutes stored in the Date object will be
incremented by 1, and 40 will be used for seconds.
Examples
theBigDay.setSeconds(30)
See also
Date.getSeconds,
Date.setUTCSeconds
setTime
Sets the
value of a Date object according to
local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
setTime(timevalue)
Parameters
|
timevalue
|
An
integer representing the number of milliseconds since 1 January
1970 00:00:00.
|
Description
Use the
setTime method
to help assign a date and time to another Date object.
Examples
theBigDay = new Date("July 1, 1999")
sameAsBigDay = new Date()
sameAsBigDay.setTime(theBigDay.getTime())
See also
Date.getTime,
Date.setUTCHours
setUTCDate
Sets the
day of the month for a specified date according to universal
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
setUTCDate(dayValue)
Parameters
|
dayValue
|
An
integer from 1 to 31, representing the day of the month.
|
Description
If a
parameter you specify is outside of the expected range,
setUTCDate
attempts to update the date information in the Date object
accordingly. For example, if you use 40 for dayValue, and the
month stored in the Date object is
June, the day will be changed to 10 and the month will be
incremented to July.
Examples
theBigDay = new Date();
theBigDay.setUTCDate(20);
See also
Date.getUTCDate
, Date.setDate
setUTCFullYear
Sets the
full year for a specified date according to universal time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
setUTCFullYear(yearValue[,
monthValue, dayValue])
Parameters
|
yearValue
|
An
integer specifying the numeric value of the year, for example,
1995.
|
|
monthValue
|
An
integer between 0 and 11 representing the months January through
December.
|
|
dayValue
|
An
integer between 1 and 31 representing the day of the month. If
you specify the dayValue parameter,
you must also specify the monthValue.
|
Description
If you do
not specify the monthValue and
dayValue
parameters, the values returned from the getMonth and
getDate
methods are used.
If a
parameter you specify is outside of the expected range,
setUTCFullYear
attempts to update the other parameters and the date information
in the Date object
accordingly. For example, if you specify 15 for monthValue, the
year is incremented by 1 (year + 1), and 3 is used for the month.
Examples
theBigDay = new Date();
theBigDay.setUTCFullYear(1997);
See also
Date.getUTCFullYear
, Date.setFullYear
setUTCHours
Sets the
hour for a specified date according to universal time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
setUTCHour(hoursValue[, minutesValue,
secondsValue, msValue])
Parameters
|
hoursValue
|
An
integer between 0 and 23, representing the hour.
|
|
minutesValue
|
An
integer between 0 and 59, representing the minutes.
|
|
secondsValue
|
An
integer between 0 and 59, representing the seconds. If you
specify the secondsValue
parameter, you must also specify the minutesValue.
|
|
msValue
|
A
number between 0 and 999, representing the milliseconds. If you
specify the msValue parameter,
you must also specify the minutesValue and
secondsValue.
|
Description
If you do
not specify the minutesValue,
secondsValue,
and msValue parameters,
the values returned from the getUTCMinutes,
getUTCSeconds, and
getUTCMilliseconds
methods are used.
If a
parameter you specify is outside of the expected range,
setUTCHours
attempts to update the date information in the Date object
accordingly. For example, if you use 100 for secondsValue, the
minutes will be incremented by 1 (min + 1), and 40 will be used
for seconds.
Examples
theBigDay = new Date();
theBigDay.setUTCHour(8);
See also
Date.getUTCHours
, Date.setHours
setUTCMilliseconds
Sets the
milliseconds for a specified date according to universal
time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
setUTCMilliseconds(millisecondsValue)
Parameters
|
millisecondsValue
|
A
number between 0 and 999, representing the milliseconds.
|
Description
If a
parameter you specify is outside of the expected range,
setUTCMilliseconds
attempts to update the date information in the Date object
accordingly. For example, if you use 1100 for millisecondsValue,
the seconds stored in the Date object will be
incremented by 1, and 100 will be used for milliseconds.
Examples
theBigDay = new Date();
theBigDay.setUTCMilliseconds(500);
See also
Date.getUTCMilliseconds
, Date.setMilliseconds
setUTCMinutes
Sets the
minutes for a specified date according to universal time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
setUTCMinutes(minutesValue[,
secondsValue, msValue])
Parameters
|
minutesValue
|
An
integer between 0 and 59, representing the minutes.
|
|
secondsValue
|
An
integer between 0 and 59, representing the seconds. If you
specify the secondsValue
parameter, you must also specify the minutesValue.
|
|
msValue
|
A
number between 0 and 999, representing the milliseconds. If you
specify the msValue parameter,
you must also specify the minutesValue and
secondsValue.
|
Description
If you do
not specify the secondsValue and
msValue
parameters, the values returned from getUTCSeconds and
getUTCMilliseconds
methods are used.
If a
parameter you specify is outside of the expected range,
setUTCMinutes
attempts to update the date information in the Date object
accordingly. For example, if you use 100 for secondsValue, the
minutes (minutesValue) will
be incremented by 1 (minutesValue + 1),
and 40 will be used for seconds.
Examples
theBigDay = new Date();
theBigDay.setUTCMinutes(43);
See also
Date.getUTCMinutes
, Date.setMinutes
setUTCMonth
Sets the
month for a specified date according to universal time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
setUTCMonth(monthValue[, dayValue])
Parameters
|
monthValue
|
An
integer between 0 and 11, representing the months January through
December.
|
|
dayValue
|
An
integer from 1 to 31, representing the day of the month.
|
Description
If you do
not specify the dayValue parameter, the
value returned from the getUTCDate method is
used.
If a
parameter you specify is outside of the expected range,
setUTCMonth
attempts to update the date information in the Date object
accordingly. For example, if you use 15 for monthValue, the
year will be incremented by 1 (year + 1), and 3 will be used for
month.
Examples
theBigDay = new Date();
theBigDay.setUTCMonth(11);
See also
Date.getUTCMonth
, Date.setMonth
setUTCSeconds
Sets the
seconds for a specified date according to universal time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
setUTCSeconds(secondsValue[,
msValue])
Parameters
|
secondsValue
|
An
integer between 0 and 59.
|
|
msValue
|
A
number between 0 and 999, representing the milliseconds.
|
Description
If you do
not specify the msValue parameter, the
value returned from the getUTCMilliseconds
methods is used.
If a
parameter you specify is outside of the expected range,
setUTCSeconds
attempts to update the date information in the Date object
accordingly. For example, if you use 100 for secondsValue, the
minutes stored in the Date object will be
incremented by 1, and 40 will be used for seconds.
Examples
theBigDay = new Date();
theBigDay.setUTCSeconds(20);
See also
Date.getUTCSeconds
, Date.setSeconds
setYear
Sets the
year for a specified date according to local time.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
Deprecated in JavaScript 1.3.
|
|
ECMA version
|
ECMA-262
|
Syntax
setYear(yearValue)
Parameters
Description
setYear
is no longer used and has been replaced by the setFullYear method.
If
yearValue is a
number between 0 and 99 (inclusive), then the year for
dateObjectName
is set to 1900 + yearValue.
Otherwise, the year for dateObjectName is
set to yearValue.
To take
into account years before and after 2000, you should use setFullYear instead of setYear so that the year
is specified in full.
Examples
Note that
there are two ways to set years in the 20th century.
Example
1. The year is set to 1996.
theBigDay.setYear(96)
Example
2. The year is set to 1996.
theBigDay.setYear(1996)
Example
3. The year is set to 2000.
theBigDay.setYear(2000)
See also
Date.getYear,
Date.setFullYear, Date.setUTCFullYear
toGMTString
Converts a
date to a string, using the Internet GMT conventions.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
Deprecated in JavaScript 1.3.
|
|
ECMA version
|
ECMA-262
|
Syntax
toGMTString()
Parameters
None
Description
toGMTString
is no longer used and has been replaced by the toUTCString method.
The exact
format of the value returned by toGMTString varies
according to the platform.
You should
use Date.toUTCString instead of
toGMTSTring.
Examples
In the
following example, today is a
Date
object:
today.toGMTString()
In this
example, the toGMTString method
converts the date to GMT (UTC) using the operating system's time-zone
offset and returns a string value that is similar to the following
form. The exact format depends on the platform.
Mon, 18 Dec 1995 17:28:35 GMT
See also
Date.toLocaleString,
Date.toUTCString
toLocaleString
Converts a
date to a string, using the current locale's conventions.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
toLocaleString()
Parameters
None
Description
The
toLocaleString
method relies on the underlying operating system in formatting dates.
It converts the date to a string using the formatting convention of the
operating system where the script is running. For example, in the
United States, the month appears before the date (04/15/98), whereas in
Germany the date appears before the month (15.04.98). If the operating
system is not year-2000 compliant and does not use the full year for
years before 1900 or over 2000, toLocaleString returns a
string that is not year-2000 compliant. toLocaleString behaves
similarly to toString when converting
a year that the operating system does not properly format.
Methods
such as getHours, getMinutes, and getSeconds give more portable results than
toLocaleString.
Examples
In the
following example, today is a
Date
object:
today = new Date(95,11,18,17,28,35) //months are
represented by 0 to 11
today.toLocaleString()
In this
example, toLocaleString returns a
string value that is similar to the following form. The exact format
depends on the platform.
12/18/95 17:28:35
See also
Date.toGMTString,
Date.toUTCString
toSource
Returns a
string representing the source code of the object.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
toSource()
Parameters
None
Description
The
toSource
method returns the following values:
This method
is usually called internally by JavaScript and not explicitly in code.
See also
Object.toSource
toString
Returns a
string representing the specified Date object.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.1, NES 2.0
|
|
ECMA version
|
ECMA-262
|
Syntax
toString()
Parameters
None.
Description
The
Date object overrides the
toString
method of the Object object; it
does not inherit Object.toString. For Date objects, the toString method
returns a string representation of the object.
JavaScript
calls the toString method
automatically when a date is to be represented as a text value or when
a date is referred to in a string concatenation.
Examples
The
following example assigns the toString value of a Date
object to myVar:
x =
new Date();
myVar=x.toString(); //assigns a value to myVar
similar to:
//Mon Sep 28 14:36:22 GMT-0700 (Pacific
Daylight Time) 1998
See also
Object.toString
toUTCString
Converts a
date to a string, using the universal time convention.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.3
|
|
ECMA version
|
ECMA-262
|
Syntax
toUTCString()
Parameters
None
Description
The value
returned by toUTCString is a readable
string formatted according to UTC convention. The format of the return
value may vary according to the platform.
Examples
var
UTCstring;
Today = new Date();
UTCstring = Today.toUTCString();
See also
Date.toLocaleString,
Date.toUTCString
UTC
Returns
the number of milliseconds in a Date object since January
1, 1970, 00:00:00, universal time.
|
Method of
|
Date
|
|
Static
|
|
Implemented in
|
JavaScript 1.0, NES 2.0
JavaScript 1.3: added ms parameter.
|
|
ECMA version
|
ECMA-262
|
Syntax
Date.UTC(year, month, day[,
hrs, min, sec, ms])
Parameters
|
year
|
A
year after 1900.
|
|
month
|
An
integer between 0 and 11 representing the month.
|
|
date
|
An
integer between 1 and 31 representing the day of the month.
|
|
hrs
|
An
integer between 0 and 23 representing the hours.
|
|
min
|
An
integer between 0 and 59 representing the minutes.
|
|
sec
|
An
integer between 0 and 59 representing the seconds.
|
|
ms
|
An
integer between 0 and 999 representing the milliseconds.
|
Description
UTC
takes comma-delimited date parameters and returns the number of
milliseconds between January 1, 1970, 00:00:00, universal time
and the time you specified.
You should
specify a full year for the year; for example, 1998. If a year between
0 and 99 is specified, the method converts the year to a year in the
20th century (1900 + year); for example, if you specify 95, the year
1995 is used.
The
UTC method
differs from the Date constructor in two
ways.
-
-
Date.UTC uses universal
time instead of the local time.
-
Date.UTC returns a time
value as a number instead of creating a Date object.
If a
parameter you specify is outside of the expected range, the
UTC method
updates the other parameters to allow for your number. For example,
if you use 15 for month, the year will
be incremented by 1 (year + 1), and 3 will be used for the month.
Because
UTC is a static method of Date, you always use it
as Date.UTC(),
rather than as a method of a Date object you created.
Examples
The
following statement creates a Date object using GMT
instead of local time:
gmtDate = new Date(Date.UTC(96, 11, 1, 0, 0, 0))
See also
Date.parse
valueOf
Returns
the primitive value of a Date object.
|
Method of
|
Date
|
|
Implemented in
|
JavaScript 1.1
|
|
ECMA version
|
ECMA-262
|
Syntax
valueOf()
Parameters
None
Description
The
valueOf method
of Date returns the primitive value of
a Date object as a number data type, the number of milliseconds since
midnight 01 January, 1970 UTC.
This
method is usually called internally by JavaScript and not explicitly in
code.
Examples
x =
new Date(56,6,17);
myVar=x.valueOf() //assigns
-424713600000 to myVar
See also
Object.valueOf
