title: Substract 15 Minutes from time using Perl
body: <p>I thought this was going to be very simple but I am really out of options now. I want to substract 15 minutes from a given time. </p>
  
  <p>Example 
  My time is 15:04 I want to substract 15 minutes to be 14:49. I have searched for solutions on the internet but there is no perl module that can help me out.</p>