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# std.datetime

Phobos provides the following functionality for time:

Functionality | Symbols
--- | ---
Points in Time | Date TimeOfDay DateTime SysTime
Timezones | TimeZone UTC LocalTime PosixTimeZone WindowsTimeZone SimpleTimeZone
Intervals and Ranges of Time | Interval PosInfInterval NegInfInterval
Durations of Time | Duration weeks days hours minutes seconds msecs usecs hnsecs nsecs
Time Measurement and Benchmarking | MonoTime StopWatch benchmark

This functionality is separated into the following modules

- std.datetime.date for points in time without timezones.
- std.datetime.timezone for classes which represent timezones.
- std.datetime.systime for a point in time with a timezone.
- std.datetime.interval for types which represent series of points in time.
- std.datetime.stopwatch for measuring time.

See Also:
Introduction to std.datetime
ISO 8601
Wikipedia entry on TZ Database
List of Time Zones
License:
Boost License 1.0.
Authors:
Jonathan M Davis and Kato Shoichi

Source std/datetime/package.d

Examples:
Get the current time from the system clock

    import std.datetime.systime : SysTime, Clock;

    SysTime currentTime = Clock.currTime();

Examples:
Construct a specific point in time without timezone information and get its ISO string.

    import std.datetime.date : DateTime;

    auto dt = DateTime(2018, 1, 1, 12, 30, 10);
    writeln(dt.toISOString()); // "20180101T123010"
    writeln(dt.toISOExtString()); // "2018-01-01T12:30:10"

Examples:
Construct a specific point in time in the UTC timezone and add two days.

    import std.datetime.systime : SysTime;
    import std.datetime.timezone : UTC;
    import core.time : days;

    auto st = SysTime(DateTime(2018, 1, 1, 12, 30, 10), UTC());
    writeln(st.toISOExtString()); // "2018-01-01T12:30:10Z"
    st += 2.days;
    writeln(st.toISOExtString()); // "2018-01-03T12:30:10Z"

Copyright © 1999-2023 by the D Language Foundation | Page generated by Ddoc on Tue Aug 1 20:58:16 2023