Use Date::Calc module 
use Date::Calc qw(Delta_Days);
$days = Delta_Days( $year1, $month1, $day1, $year2, $month2, $day2);

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or if you have the time also use this form:- 
use Date::Calc qw(Delta_DHMS);
($days, $hours, $minutes, $seconds) =
  Delta_DHMS( $year1, $month1, $day1, $hour1, $minute1, $seconds1,  # 
+earlier
              $year2, $month2, $day2, $hour2, $minute2, $seconds2); # 
+later

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In reply to Re: date subtraction by neeraj
in thread date subtraction by kasmot

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