The date under my wizard's name shows I started playing Wizard10 Feb. 28 2014 being my 3rd account. I actually started early summer of 2010. I made a big booboo and lost that account. Lesson learned
It's posted to the left, beneath your avatar here on the Message Boards.
For you, it says:
November 25, 2011.
From the looks of it, I can tell that this is also your first post.
In that case, welcome!
Unless of course you're one of those Wizards (Like Me) that joined waaaaaaay back when but on a family account. My wife, myself and each of kids each played one wizard on the account as it was all we could afford.
She passed in early 2010, so I KNOW I "joined" by at least 2009. I took a hiatus from the game simply because the memories. So the Joined Date by my name is not entirely accurate.