When the day (and time) is not involved, your question does not need Date::Calc or anything fancy.

$ perl -wE'my($m,$y)=(localtime)[4,5];--$m<0 and($m,$y)=($m+12,$y--);s
+ay $m+1,"-",$y+1900;'
9-2018

[download]

or as sub

sub previous_month {
    my ($month, $year) = @_; # month = 1..12
    if (--$month < 1) {
        $month = 12;
        $year--;
        }
    ($month, $year);
    } # previous_month

say for previous_month (10, 2018);

[download]

Enjoy, Have FUN! H.Merijn

In reply to Re: How to get last month date using Date::Calc by Tux
in thread How to get last month date using Date::Calc by kanewilliam7777

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