#!/usr/bin/perl -w
use strict;
my @months = qw(
January February March April May June July
August September October November December
);
my ($day, $mon, $year, $dow) = (localtime)[3..6];
my $start_dow = ($dow - ($day - 1)) % 7;
for (1 .. shift || 1) {
$year++ if $mon != ($mon % 12);
$mon %= 12;
my $dim = days_in_month($mon,$year);
print $months[$mon], ' ', $year + 1900, "\n";
print "Sun Mon Tue Wed Thu Fri Sat\n";
for (1 .. $dim + $start_dow) {
print ' ' and next if ($_-1) < $start_dow;
printf '%3d', $_ - $start_dow;
print $_ % 7 ? ' ' : "\n";
}
print "\n" x (($dim + $start_dow) % 7 ? 2 : 1);
$start_dow = ($start_dow + $dim) % 7;
$mon++;
}
BEGIN {
my @days = (31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
sub days_in_month {
my ($m,$y) = @_;
my $days = $days[$m];
$y += 1900;
$days++ if $m == 1 and $y % 4 == 0 and ($y % 100 != 0 or $y % 400
+== 0);
return $days;
}
}
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