std.datetime

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

Phobos provides the following functionality for time: 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"