But bear in mind it's often innacurate - and several people have found different account ages showing for different characters on the same account in the past....
Would be good to have anywhere, either in-game or from your account management pages, that can accurately state what the game considers your 'age' - which is the total amount of time you have paid subs for access to the game. The 'this account was created on' part of is interesting, but since everything in-game is really determined by 'paid for playing time' not a huge amount of use.