Hello Corion, Earlier I received a piece of code in part like this: 

#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11152433
use warnings;
use Time::Piece;
use Time::Seconds;
{
print "MONTH is first, then DAY. That is: MM/DD/YYYY\n";

@ARGV = '05/01/2023'; # MONTH comes first

my $t = Time::Piece->strptime("$ARGV[0] 12", "%m/%d/%Y %H");

my $daybefore = ($t - ONE_DAY)->mdy("/");

printf <<END, $ARGV[0], $daybefore;

Date  as  supplied: %s

Date minus one day: %s

END
}

[download]
download Outputs: MONTH is first, then DAY. That is: MM/DD/YYYY Date as supplied: 05/01/2023 Date minus one day: 04/30/2023

As I attempted to comment before, this works perfectly but I don't have the luxury of manually entering the date as shown. (@ARGV = '05/01/2023';) My script provides the date in a string. From there I need the script to provide "the day before" in a different string. (At least that is the plan) When I attempt to use the string within the above code I cannot get it to work, I guess primarily because I don't understand Time::Piece well at all.

In reply to Re^6: The day before a specific date by jpys
in thread The day before a specific date by jpys

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