Perl ABC

1. Perl
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2. Date/Time

Handle date/time in Perl

The handling of "date/time" in Perl is summarized.

If Perl 5.10 or later is installed, the standard module Time::Piece that handles date and time is attached as standard. We recommend that you try this first.

• Time::Piece - Handling dates and times

If you want to handle dates more strictly than Time::Piece, you can install the DataTime module from cpan.

• DateTime - General-purpose handling of dates and times

When it comes to large-scale processing, date/time processing may become a bottleneck. In such cases, you can also use the high-performance Time::Moment module.

• Time::Moment - CPAN

Builtin functions for handling date/time

• Get the number of seconds elapsed from the epoch to the present time - time function
• Get the current date and time(local time) - localtime function
• Get the current date and time(Coordinated Universal Time) - gmtime function
• Convert date and time(local time) to epoch seconds -Time::Local::timelocal ()
• Convert date and time(Coordinated Universal Time) to epoch seconds -Time::Local::timegm ()

Special date

• Get a list of holidays (Google Calendar Data API)
• Determine if it is a leap year
• Determine if it exists
• Get the last day of the month

Time calculation

• Find the time difference (if it does not exceed 24 hours)
• Find the time difference (including the date in the time)