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Struct `std.datetime.date.DateTime`

Combines the Date and TimeOfDay structs to give an object which holds both the date and the time. It is optimized for calendar-based operations and has no concept of time zone. For an object which is optimized for time operations based on the system time, use SysTime. SysTime has a concept of time zone and has much higher precision (hnsecs). DateTime is intended primarily for calendar-based uses rather than precise time operations.


						
				struct DateTime
				;

Constructors

Name	Description
`this`
`this`

Properties

Name	Type	Description
`date`[get]	`Date`	The date portion of `DateTime`.
`date`[set]	`const(Date)`	The date portion of `DateTime`.
`day`[get]	`ubyte`	Day of a Gregorian Month.
`day`[set]	`int`	Day of a Gregorian Month.
`dayOfGregorianCal`[get]	`int`	The Xth day of the Gregorian Calendar that this `DateTime` is on.
`dayOfGregorianCal`[set]	`int`	The Xth day of the Gregorian Calendar that this `DateTime` is on. Setting this property does not affect the time portion of `DateTime`.
`dayOfWeek`[get]	`DayOfWeek`	Day of the week this `DateTime` is on.
`dayOfYear`[get]	`ushort`	Day of the year this `DateTime` is on.
`dayOfYear`[set]	`int`	Day of the year.
`daysInMonth`[get]	`ubyte`	The last day in the month that this `DateTime` is in.
`endOfMonth`[get]	`DateTime`	`DateTime` for the last day in the month that this `DateTime` is in. The time portion of endOfMonth is always 23:59:59.
`hour`[get]	`ubyte`	Hours past midnight.
`hour`[set]	`int`	Hours past midnight.
`isAD`[get]	`bool`	Whether the current year is a date in A.D.
`isLeapYear`[get]	`bool`	Whether this `DateTime` is in a leap year.
`isoWeek`[get]	`ubyte`	The ISO 8601 week of the year that this `DateTime` is in.
`julianDay`[get]	`long`	The Julian day for this `DateTime` at the given time. For example, prior to noon, 1996-03-31 would be the Julian day number 2_450_173, so this function returns 2_450_173, while from noon onward, the julian day number would be 2_450_174, so this function returns 2_450_174.
`max`[get]	`DateTime`	Returns the `DateTime` farthest in the future which is representable by `DateTime`.
`min`[get]	`DateTime`	Returns the `DateTime` farthest in the past which is representable by `DateTime`.
`minute`[get]	`ubyte`	Minutes past the hour.
`minute`[set]	`int`	Minutes past the hour.
`modJulianDay`[get]	`long`	The modified Julian day for any time on this date (since, the modified Julian day changes at midnight).
`month`[get]	`Month`	Month of a Gregorian Year.
`month`[set]	`Month`	Month of a Gregorian Year.
`second`[get]	`ubyte`	Seconds past the minute.
`second`[set]	`int`	Seconds past the minute.
`timeOfDay`[get]	`TimeOfDay`	The time portion of `DateTime`.
`timeOfDay`[set]	`const(TimeOfDay)`	The time portion of `DateTime`.
`year`[get]	`short`	Year of the Gregorian Calendar. Positive numbers are A.D. Non-positive are B.C.
`year`[set]	`int`	Year of the Gregorian Calendar. Positive numbers are A.D. Non-positive are B.C.
`yearBC`[get]	`short`	Year B.C. of the Gregorian Calendar counting year 0 as 1 B.C.
`yearBC`[set]	`int`	Year B.C. of the Gregorian Calendar counting year 0 as 1 B.C.

Methods

Name	Description
`add`	Adds the given number of years or months to this `DateTime`. A negative number will subtract.
`diffMonths`	Returns the difference between the two `DateTime`s in months.
`fromISOExtString`	Creates a `DateTime` from a string with the format YYYY-MM-DDTHH:MM:SS. Whitespace is stripped from the given string.
`fromISOString`	Creates a `DateTime` from a string with the format YYYYMMDDTHHMMSS. Whitespace is stripped from the given string.
`fromSimpleString`	Creates a `DateTime` from a string with the format YYYY-Mon-DD HH:MM:SS. Whitespace is stripped from the given string.
`opBinary`	Gives the result of adding or subtracting a `Duration` from this `DateTime`.
`opBinary`	Gives the difference between two `DateTime`s.
`opCmp`	Compares this `DateTime` with the given `DateTime.`.
`opOpAssign`	Gives the result of adding or subtracting a duration from this `DateTime`, as well as assigning the result to this `DateTime`.
`roll`	Adds the given number of years or months to this `DateTime`. A negative number will subtract.
`roll`	Adds the given number of units to this `DateTime`. A negative number will subtract.
`toISOExtString`	Converts this `DateTime` to a string with the format `YYYY-MM-DDTHH:MM:SS`. If `writer` is set, the resulting string will be written directly to it.
`toISOString`	Converts this `DateTime` to a string with the format `YYYYMMDDTHHMMSS`. If `writer` is set, the resulting string will be written directly to it.
`toSimpleString`	Converts this `DateTime` to a string with the format `YYYY-Mon-DD HH:MM:SS`. If `writer` is set, the resulting string will be written directly to it.
`toString`	Converts this `DateTime` to a string.

Example

import core.time : days, seconds;

auto dt = DateTime(2000, 6, 1, 10, 30, 0);

writeln(dt.date); // Date(2000, 6, 1)
writeln(dt.timeOfDay); // TimeOfDay(10, 30, 0)
writeln(dt.dayOfYear); // 153
writeln(dt.dayOfWeek); // DayOfWeek.thu

dt += 10.days + 100.seconds;
writeln(dt); // DateTime(2000, 6, 11, 10, 31, 40)

writeln(dt.toISOExtString()); // "2000-06-11T10:31:40"
writeln(dt.toISOString()); // "20000611T103140"
writeln(dt.toSimpleString()); // "2000-Jun-11 10:31:40"

writeln(DateTime.fromISOExtString("2018-01-01T12:00:00")); // DateTime(2018, 1, 1, 12, 0, 0)
writeln(DateTime.fromISOString("20180101T120000")); // DateTime(2018, 1, 1, 12, 0, 0)
writeln(DateTime.fromSimpleString("2018-Jan-01 12:00:00")); // DateTime(2018, 1, 1, 12, 0, 0)

Authors

Jonathan M Davis

License

Boost License 1.0.