Leave Month (Date) Field blank (Optional) I was wondering if it's possible to have Drupal (7), leave the Month field NULL (empty). 

When someone sets a Date, sometimes they don't need to enter a Month along with it. When I try this by Default, Drupal says a Month is needed. 

Thanks
You can use Number field and do the validation if you just want to store only DD(Day). 

Date picker is using to collect Day Month Year