FAQ 4.17 How do I find yesterday's date?

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4.17: How do I find yesterday's date?

    (contributed by brian d foy)

    Use one of the Date modules. The "DateTime" module makes it simple, and
    give you the same time of day, only the day before.

            use DateTime;

            my $yesterday = DateTime->now->subtract( days => 1 );

            print "Yesterday was $yesterday\n";

    You can also use the "Date::Calc" module using its "Today_and_Now"

            use Date::Calc qw( Today_and_Now Add_Delta_DHMS );

            my @date_time = Add_Delta_DHMS( Today_and_Now(), -1, 0, 0, 0 );

            print "@date_time\n";

    Most people try to use the time rather than the calendar to figure out
    dates, but that assumes that days are twenty-four hours each. For most
    people, there are two days a year when they aren't: the switch to and
    from summer time throws this off. Let the modules do the work.


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