Remove Date of Birth Field Format on Sign-up

[GaitovRK]

Describe the bug When you signup,if you put the date of birth, it shows Error 400. When the API response is checked it says: "Datetime has wrong format. Use one of these formats instead: YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HH:MM|-HH:MM|Z]."

Steps to Reproduce Provide a step-by-step guide to reproduce the bug. This helps developers to identify and replicate the issue.

1. sign-up page
2. put date of birth 01.01.2000
3. You will see error 400

Expected behavior Instead of error 400, it should say what is the problem (wrong date format)

Logs & Error Messages "Datetime has wrong format. Use one of these formats instead: YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HH:MM|-HH:MM|Z]."

Additional context