Extending the Year range in Popup Calendar
Step 1 :
   Edit the file date_year_range.js located in this path : sites\all\modules\date\date_api\ 
Step 2 :
   Locate this line : Line 67 start = Math.min(this.getOriginal('int'), -n) n is the number you specified in your Drupal 
Step 3 :
   Replace n with the value you want, for example for the field date of birth i want 60 years besfore today 
Step 4 :
   Go back to your web site, edit the content type, then manage fields and change more settings and values of your date field.