My task here is to make a list of all of the "first day of the month" days between a start date and an end date. I'm interested to hear thoughts about my solution: 
use strict;
use warnings;
use Time::Piece;
use feature 'say';

my $date = Time::Piece->strptime(
        localtime->year() - 4 . " 01 01",
        "%Y %m %d"
);
my $endDate = localtime();

while ( $date <= $endDate ) {
        say $date;

        # Get the next first of the month by going to the end of the
        # month and add one day
        my $year = $date->year;
        my $mon  = $date->mon;
        my $day  = $date->month_last_day;
        $date = Time::Piece->strptime( "$year $mon $day", "%Y %m %d" )
+;
        $date += Time::Seconds::ONE_DAY;
}

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In reply to RFC: List of first day of each month by TieUpYourCamel

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