Custom Field - Date Validation rules

Is there any documentation related to the format of the Validation Rules or Server Validation Rules for Date Fields?

Specifically I need to set that the date must be more than 13 years ago (for a date-of-birth field).
I've selected Data Type Validation: Past Date, and it results in this:

validate[required,custom[date],past[2021-05-14]]

I set that field on 5/14, so it appears that this is a static date rule.
We need the ability to have it always check for '13 years ago' for the current date.

Is this possible with the validation rule.

I couldn't find any documentation specifically for Data Validation.

Does anyone else know how this works with some syntax examples?

Hello

Better use server validation rule. Set it to age:13 and it should work, I think

Tuan

Thanks. "age:13" does work for server-side validation; however, we would like to be able to validate this (and possibly other fields) within the browser.

Is there no documentation for this validation code? Are you using a standard library for validation, etc?

Hello

We use jQuery validation engine for client side validation, but it does not support that rule, sorry. See github.com/posabsolute/jQuery-Validation-Engine

For server side validation, we use this library github.com/vlucas/valitron

(The age validation rule is added by us as the rule is not available in the original package)

Tuan