> Note that this approach will have a problem for those days with less than 24 hours

If you want Time::Piece to respect time zones, you need to initialize the object from localtime, not from the class itself: 

$ TZ=Europe/London perl -MTime::Piece -wE '
    for my $source ("Time::Piece", scalar localtime()) {
        my $t = $source->strptime("2023/03/27", "%Y/%m/%d");
        say $t - 86400;
    }'
Sun Mar 26 00:00:00 2023
Sat Mar 25 23:00:00 2023

[download]

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re^3: Yesterday's date by choroba
in thread Yesterday's date by jpys

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