title: In Perl, how can I find last Thursday's date?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/6262151/in-perl-how-can-find-the-date-of-the-previous-monday-for-a-given-date">In Perl, how can find the date of the previous Monday for a given date?</a>  </p>
  </blockquote>
  
  
  
  <p>In the perl, how to write a function to get last Thursday's date? Today (11/21), I want to get 11/17. How can I figure out if a given date is a Sunday or not?</p>