jacoby 175 pt 1

1 files changed, 28 insertions, 0 deletions

diff --git a/challenge-175/dave-jacoby/perl/ch-1.pl b/challenge-175/dave-jacoby/perl/ch-1.pl
new file mode 100644
index 0000000000..33ade5d6fe
--- /dev/null
+++ b/challenge-175/dave-jacoby/perl/ch-1.pl
@@ -0,0 +1,28 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use experimental qw{ say postderef signatures state };
+
+use DateTime;
+
+my $year = 2022;
+
+for my $month ( 1 .. 12 ) {
+    my $dt = DateTime->new(
+        year      => $year,
+        month     => $month,
+        day       => 1,
+        time_zone => 'floating'
+    );
+    $dt->add( days => 32 );
+
+    # Remember that days of week are 1-7, and 0 doesn't match
+    # this isn't crontab
+    while (1) {
+        $dt->subtract( days => 1 );
+        next unless $dt->month == $month;
+        last if $dt->day_of_week == 7;
+    }
+    say $dt->ymd;
+}