my $t = localtime->strptime(localtime->ymd(), '%Y-%m-%d'); my $yesterday = $t - ( 0.5 * ONE_DAY() ); my $tomorrow = $t + ( 1.5 * ONE_DAY() ); print "Today: ", $t->ymd(),"\n"; print "Yesterday: ", $yesterday->ymd(),"\n"; print "Tomorrow: ", $tomorrow->ymd(),"\n";