For those of us not from the star spangled lands:

The Nineteenth Amendment (Amendment XIX) to the United States Constitution prohibits the United States and its states from denying the right to vote to citizens of the United States on the basis of sex, in effect recognizing the right of women to vote.

So OPs dad is a sexist prick.

FWIW, this is my opinion as a millennial.

It is preposterous that an Act passed in 2021 has portions that are yet to come into force.