♫ Walk with me
Would you stay a while
And talk with me
My Gaia > Account Settings >
Profile Options
Under the "Display Details" section, check the box next to "Registered" to show your registration date in your details panel.
Then on your profile itself, add in the details panel. You can either leave this public for everyone, or just turn it on, see for yourself, and then remove it. ^^
EDIT: Or Angels Alibi's method, which is probably a lot faster. xD
I wonder if you'll be
The one to calm this raging storm
That's inside of me ♫