An alternative way on using the Date::Manip module could be:
use feature 'say';
my $date1 = ParseDate("today");
my $date2 = ParseDate("2019-08-10");
my $delta = DateCalc($date2, $date1, \my $err, 1);
say Delta_Format($delta, "Months: %Mv Days: %dv");
$ perl test.pl
Months: -2 Days: 0
You can create your own conditions based on the string when you want to have an alarm etc.
Hope this helps, BR.
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