alright ( i think i have you before).
1. go to the top right corner of your screen where it says your name and click on it.
2. then you should hit edit profile, you should see a bunch of things you can change.
3. then click/tap on "preferences".
4. most of the time when a year passes your account age goes up by one year. just keep on doing this so you can stay 19 forever not 58. (;