Avoid all those problems with short or long days and daylight savings time switches by using the middle of the day :) 

#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11152433
use warnings;
use Time::Piece;
use Time::Seconds;

@ARGV = '28/05/2023';

my $t = -ONE_DAY + Time::Piece->strptime("$ARGV[0] 12", "%d/%m/%Y %H")
+;
print localtime($t) . " should be near middle of the day\n\n";
printf "Date as supplied: %s\nDate minus one day: %s\n", $ARGV[0], $t-
+>dmy("/");

[download]

Outputs: 

Sat May 27 12:00:00 2023 should be near middle of the day

Date as supplied: 28/05/2023
Date minus one day: 27/05/2023

[download]

In reply to Re: Yesterday's date by tybalt89
in thread Yesterday's date by jpys

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