FAQ 4.12 How do I find the day or week of the year?
- From: PerlFAQ Server <comdog@xxxxxxxx>
- Date: Sat, 28 Jan 2006 05:03:01 +0000 (UTC)
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4.12: How do I find the day or week of the year?
The localtime function returns the day of the year. Without an argument
localtime uses the current time.
$day_of_year = (localtime)[7];
The POSIX module can also format a date as the day of the year or week
of the year.
use POSIX qw/strftime/;
my $day_of_year = strftime "%j", localtime;
my $week_of_year = strftime "%W", localtime;
To get the day of year for any date, use the Time::Local module to get a
time in epoch seconds for the argument to localtime.
use POSIX qw/strftime/;
use Time::Local;
my $week_of_year = strftime "%W",
localtime( timelocal( 0, 0, 0, 18, 11, 1987 ) );
The Date::Calc module provides two functions to calculate these.
use Date::Calc;
my $day_of_year = Day_of_Year( 1987, 12, 18 );
my $week_of_year = Week_of_Year( 1987, 12, 18 );
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