The inPeriod function determines if a given time falls within a given period. inPeriod returns 1 if the time does fall within the given period, 0 if not, and -1 if inPeriod detects a malformed time or period. The time is specified as per the "time()"...

Parses a string to get a time out of it using "Format Specifiers" reminiscent of C's "scanf" and indeed "strptime" functions....

Terrestrial Time (TT) is a time scale representing time on the surface of Terra. Specifically, it is the proper time experienced by a clock located on the rotating geoid (i.e., at sea level). It is indirectly the basis for Terran civil timekeeping, v...

Barycentric Coordinate Time (TCB) is a coordinate time scale representing time in the Sol system. Specifically, it is the proper time experienced by a distant clock comoving with the barycentre of the Sol system. This module represents instants on th...

The Global Positioning System (GPS) includes as an integral feature the dissemination of a very precise time scale. This time scale is produced by atomic clocks on the satellites, and is steered to keep in step with International Atomic Time (TAI). T...

Geocentric Coordinate Time (TCG) is a coordinate time scale representing time in the Terran system. Specifically, it is the proper time experienced by a distant clock comoving with the geocentre. It is linearly related to Terrestrial Time (TT), which...

International Atomic Time (TAI) is a time scale produced by an ensemble of atomic clocks around Terra. It attempts to tick at the rate of proper time on the Terran geoid (i.e., at sea level), and thus is the principal realisation of Terrestrial Time ...

This module encapsulates knowledge about the structure of the UTC time scale, including the leap seconds of the current incarnation. This information is useful in manipulating times stored in a UTC-based format, or in converting between UTC and TAI (...

Time::SoFar has two functions for calculating how long a script has been running. "runtime()" always works from the time the script was started (using *$^T*). "runinterval()" works from the last time "runtime()" or "runinterval()" was called (or sinc...

This module replaces the standard "localtime" and "gmtime" functions with implementations that return objects. It does so in a backwards compatible manner, so that using localtime/gmtime in the way documented in perlfunc will still return what you ex...

This module replaces the standard localtime and gmtime functions with implementations that return objects. It does so in a backwards compatible manner, so that using localtime/gmtime in the way documented in perlfunc will still return what you expect...

This library provides a means to do something after waiting a specified period of time since the previous invocation under the same something label. Also, it's a singleton. Let's say you have a situation where you want to do something every 2 seconds...

This module implements a few simple time related functions...

An object of this class represents a segment of the definition of UTC in terms of TAI. Each segment is a period of time over which the relation between UTC and TAI is stable. Each point where the relation changes is a boundary between segments. Each ...

This module creates regular expressions that can be used for parsing dates and times. See Regexp::Common for a general description of how to use this interface. Parsing dates is a dirty business. Dates are generally specified in one of three possible...

Time::Duration::Concise is an improved approach to convert concise time duration to string representation....

Library of date/time manipulation routines for practical astronomy. Most of them are based on so called *Julian date (JD)*, which is the number of days elapsed since mean UT noon of January 1st 4713 BC. This system of time measurement is widely adopt...

This module implements the simple datatype built in to XML Schema....