title: calculating timestamp in iOS for core data project
body: <p>I am using core data in my project. Database is sqlite and there is column for storing "birthdate" having datatype "timestamp".</p>
  
  <p>Now, I want to insert some records in it and I am having dates in human readable format like "1809-06-17".</p>
  
  <p>How to convert this date to timestamp so that, I get this date when fetched from database.</p>
  
  <p>I tried some conversions using python script, but I got different results.</p>
  
  <p>Is there any easy way to do this? Please help me.</p>