# protected new IDate(optionsopt)
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
options |
Object
|
<optional> |
The date components to initialize this date with |
Methods
# after(dow) → {IDate}
Return a new date instance in the current calendar that represents the first instance of the given day of the week after the current date. The day of the week is encoded as a number where 0 = Sunday, 1 = Monday, etc.
Parameters:
| Name | Type | Description |
|---|---|---|
dow |
number
|
the day of the week after the current date that is being sought |
the date being sought
# before(dow) → {IDate}
Return a new date instance in the current calendar that represents the first instance of the given day of the week before the current date. The day of the week is encoded as a number where 0 = Sunday, 1 = Monday, etc.
Parameters:
| Name | Type | Description |
|---|---|---|
dow |
number
|
the day of the week before the current date that is being sought |
the date being sought
# protected firstSunday(year) → {number}
Return the rd number of the first Sunday of the given ISO year.
Parameters:
| Name | Type | Description |
|---|---|---|
year |
number
|
the year for which the first Sunday is being sought |
the rd of the first Sunday of the ISO year
number
# getJSDate() → {Date|undefined}
Return a Javascript Date object that is equivalent to this date object.
a javascript Date object
Date
|
undefined
# getJulianDay() → {number}
Return the Julian Day equivalent to this calendar date as a number.
the julian date equivalent of this date
number
# protected getRataDie() → {number}
Return the Rata Die (fixed day) number of this date.
the rd date as a number
number
# getTime() → {number}
Return the unix time equivalent to this date instance. Unix time is the number of milliseconds since midnight on Jan 1, 1970 UTC (Gregorian). This method only returns a valid number for dates between midnight, Jan 1, 1970 UTC (Gregorian) and Jan 19, 2038 at 3:14:07am UTC (Gregorian) when the unix time runs out. If this instance encodes a date outside of that range, this method will return -1. For date types that are not Gregorian, the point in time represented by this date object will only give a return value if it is in the correct range in the Gregorian calendar as given previously.
a number giving the unix time, or -1 if the date is outside the valid unix time range
number
# getTimeExtended() → {number}
Return the extended unix time equivalent to this Gregorian date instance. Unix time is the number of milliseconds since midnight on Jan 1, 1970 UTC. Traditionally unix time (or the type "time_t" in C/C++) is only encoded with an unsigned 32 bit integer, and thus runs out on Jan 19, 2038. However, most Javascript engines encode numbers well above 32 bits and the Date object allows you to encode up to 100 million days worth of time after Jan 1, 1970, and even more interestingly, 100 million days worth of time before Jan 1, 1970 as well. This method returns the number of milliseconds in that extended range. If this instance encodes a date outside of that range, this method will return NaN.
a number giving the extended unix time, or Nan if the date is outside the valid extended unix time range
number
# getTimeZone() → {string|undefined}
Return the time zone associated with this date, or undefined if none was specified in the constructor.
the name of the time zone for this date instance
string
|
undefined
# getWeekOfMonth(locale) → {number}
Return the ordinal number of the week within the month. The first week of a month is the first one that contains 4 or more days in that month. If any days precede this first week, they are marked as being in week 0. This function returns values from 0 through 6.
The locale is a required parameter because different locales that use the same Gregorian calendar consider different days of the week to be the beginning of the week. This can affect the week of the month in which some days are located.
Parameters:
| Name | Type | Description |
|---|---|---|
locale |
Locale
|
string
|
the locale or locale spec to use when figuring out the first day of the week |
the ordinal number of the week within the current month
number
# getWeekOfYear() → {number}
Return the ISO 8601 week number in the current year for the current date. The week number ranges from 0 to 55, as some years have 55 weeks assigned to them in some calendars.
the week number for the current date
number
# onOrAfter(dow) → {IDate}
Return a new Gregorian date instance that represents the first instance of the given day of the week on or after the current date. The day of the week is encoded as a number where 0 = Sunday, 1 = Monday, etc.
Parameters:
| Name | Type | Description |
|---|---|---|
dow |
number
|
the day of the week on or after the current date that is being sought |
the date being sought
# onOrBefore(dow) → {IDate}
Return a new Gregorian date instance that represents the first instance of the given day of the week on or before the current date. The day of the week is encoded as a number where 0 = Sunday, 1 = Monday, etc.
Parameters:
| Name | Type | Description |
|---|---|---|
dow |
number
|
the day of the week on or before the current date that is being sought |
the date being sought
# setJulianDay(date)
Set the date of this instance using a Julian Day.
Parameters:
| Name | Type | Description |
|---|---|---|
date |
number
|
JulianDay
|
the Julian Day to use to set this date |
# protected setRd(rd)
Set the date components of this instance based on the given rd.
Parameters:
| Name | Type | Description |
|---|---|---|
rd |
number
|
the rata die date to set |
# setTime(millis)
Set the time of this instance according to the given unix time. Unix time is the number of milliseconds since midnight on Jan 1, 1970.
Parameters:
| Name | Type | Description |
|---|---|---|
millis |
number
|
the unix time to set this date to in milliseconds |
# setTimeZone(tzNameopt)
Set the time zone associated with this date.
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
tzName |
string
|
<optional> |
the name of the time zone to set into this date instance, or "undefined" to unset the time zone |