Question Regarding Date of Birth Validation Condition

Hi! I am trying to set a date of birth validation condition such that respondents cannot enter the current date as their birthday. However, when I put the following statement in the validation condition field: . >= today(), the validation does not trigger, even when respondents put in today's date as their birthday. They are still able to proceed with the rest of the survey questions.

Am I missing an element in my validation condition? Any input regarding this would be much appreciated. Thanks!

Actually, I realized what I did wrong. The validation condition should be . < today().