need to check birthdate in Validation rule

Question

I need to check birthdate in validation rule .If birthdate==01/01/2000 then i need to throw an validation error.

I used below condition but I am getting different error Birthdate=DATE(01,01,2000)

Error while saving record:

Validation Formula "birtdate_Validation" Invalid (Month or Day out of range in DATE() function)'

Answer 1

Date function takes Year, Month and Date in that order.

https://help.salesforce.com/articleView?id=customize_functions_a_h.htm&type=5

eg.

DATE(2000, 01, 01)