How do you find out how long you have been on facebook for?

[me]

And, my facebook went all weird a few weeks ago. At the top it only shows certain news feeds. It sometimes shows just links, just apps, just status's or just certain people. I dont know how to fix it.
Please help? And how do you find out how long you've been a member?

[Jenna]

when you join you recieve a email that will have a date on it! i suggest emailing facebook and ask them, they could help you Good luck!