From e91dfe6e10f8192197ac5c81c8c82fafd1b377f6 Mon Sep 17 00:00:00 2001
From: Guillermo Ramos
Date: Mon, 29 Jul 2019 19:44:35 +0200
Subject: [019#1]

---
 019/ch1.pl | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100755 019/ch1.pl

diff --git a/019/ch1.pl b/019/ch1.pl
new file mode 100755
index 0000000..a3acb81
--- /dev/null
+++ b/019/ch1.pl
@@ -0,0 +1,23 @@
+#!/usr/bin/env perl
+#
+# Write a script to display months from the year 1900 to 2019 where you find 5
+# weekends i.e. 5 Friday, 5 Saturday and 5 Sunday.
+################################################################################
+
+use strict;
+use warnings;
+
+use DateTime;
+
+my @months;
+for my $year (1900 .. 2019) {
+    for my $month (1 .. 12) {
+        my $date = DateTime->last_day_of_month(year => $year, month => $month);
+        my $day = $date->day;
+        my $dow = $date->day_of_week();
+        push @months, $date->strftime("%m/%Y")
+            if $day == 30 && $dow == 7 || $day == 31 && ($dow == 7 || $dow == 1);
+    }
+}
+
+print "Months with 5 weekends: @months\n"
-- 
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