If you don’t have a Google apps account, you won’t be able to use the how-to.
If you want to skip the sad story, scroll down to the “How to Change an Incorrect Birth date in Google Apps.” Now I’ll tell you straight up that this is part sad story and part how-to. I say it’s a “help” document, but when you’re done with my post, you can tell me whether it is deserving of the name. The above snippet is from a Google help document. Why Was My (Google) Account Disabled? You have entered a birthday indicating you are not old enough to have a Google Account.