No, that’s not true. A birth week recurs yearly, not weekly.
A birth day is the day on which you were born, say Saturday, and you’ll have one of those every week.
A birth week is the number of the week in which you were born, say week 14, and it takes a year before it’s week 14 again. Same interval as a birth month.
A birth date only occurs once. It’ll never be July 4, 1981 ever again.
This is all very normal and logical. Beep boop.
Thank you! You are welcome to join me next week when I celebrate my 2079th birth day.