Follow some step given below. I hope, your Hotmail account age is changed
A) - +Sign in to your Hotmail account.
B) - Click on "Profile" Option.
C) - Click "Add Info" beneath "Contact Info." Click "Edit Info."
D) - Change your birth month, day and year in the "Birth Date" column.
E) - Click "Save" to update your birthday for your Hotmail account.