How to change my birthdate on my Xbox account?

If you're able te age of adulthood you can change it, but if it is set below, you'll have to wait until that date has surpassed the age of adulthood to change it. That's is true. This next part im not sure is true, but I heard changing it no matter when,
will reault in all purchases of 17/18+ content being revoked and home console setting undone. Not sure if that's true, but I do know that the age of adulthood part is correct.

hm well that is unfortunate, the problem is not the account being set below the age of adulthood but rather that I don't even know how to check what the current birth day on the account is. I basically just want to check to see what it is because I rushed
through the creation of the account years ago and don't believe I put in the right date. So is there any way I can just check to see what the current birthdate on the account is?

There is no way to change your Birthday

Please don't bump old threads.

Only creating a new gamertag allows the use of a different birthdate, but that will result in having to start all games, achievements, subscriptions from scratch etc