Whenever I visit a store page for an M-rated game, I am prompted with a warning asking my date-of-birth, to prove I'm old enough for the game. I understand this. What I don't understand is why it partially forgets my birthdate. It seems to remember the day and the year correctly, but not the month. What's going on here?
I am aware of this question which seems similar at first glance, but is not. I understand why steam has to ask me my birthdate every time, but I don't understand why it only partially remembers my birthdate. It gets the day and year correct, but the month always defaults to January.