title: How to work with date in Unity c#?
body: <p>I create a game in unity. And I add a 'buy subscribe' (apple). </p>
  
  <p>After click buy, I get Date (for example: <strong>08/02/2018 07:24:23</strong>) 08 - is month, 02 - is date. </p>
  
  <p>I get a date through this code:
  <strong>productReceipt.subscriptionExpirationDate</strong></p>
  
  <p>Now i need to do a check, if CurrentDay - 08/02/2018 07:24:23 = 15 days;</p>
  
  <p>How to calculate 2 dates?</p>