Webform validate 18 years old (GNU Date Input Format)

Question

I'm looking for a valid webform date pattern, to validate a user's birthday (component date).

I want to make sure the person is 18 years of age or older. However, Drupal requires the GNU Date Input Format.

Screenshot of a webform backend (Drupal 6)

This seems not to work - Drupal shows no error message at all ?

Webform input - 24.09.2014

There is also a related answer Field Validation: 18 Years or Older, but this seems to be super complicated and does not affect the webform module.

Why not to use 18 years ago? Using date arithmetic might well be unsuppoted, as it's not really a date format, it's date calculation. — Mołot, Sep 24 '13 at 9:31

mate64 · Accepted Answer · 2013-09-25 08:53:07Z

0

Here's the solution for this annoying "feature":

Drupal validate 18 years old webform

answered Sep 24 '13 at 10:48

mate64

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Please keep your language civil and avoid emotional attitude. Now you are pretty close to "inappropriate for respectful discourse" flag reason. – Mołot Sep 24 '13 at 11:35

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