How to custom validate date for Validation Engine

How to custom validate date for Validation Engine

Hi everyone,

Please help me how to custom the validation engine for this rule:

- Validate by mm-dd-yyyy
I tried change the pattern in jquery.validationEngine-en.js into this, but it still error!
- I want just only 18+ people can join. So where do i need custom? And how?
  1. var pattern = new RegExp(/^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)dd$/);