title: Regex for date of birth
body: <p>I am trying to implement a regex for date of birth in the format of MM/DD/YYYY.
  I could not figure out how to force users in typing 01-12 for MM, 01-31 for day, and any four
  digits for year.
  I simply have a regex for MM/DD/YYYY which is @"^\d{2}/\d{2}/\d{4}$".
  Any suggestions would be greatly appreciated.</p>
  
  <p>Thanks</p>