How do I find out when a yahoo email address was created?

I just need to know the date it was created.
How do I find out when a yahoo email address was created?
There's no way to tell. You can e-mail them and ask and hope they tell the truth. You can also check their user profile and see if they left the date the account was created on there. http://profiles.yahoo.com/xxxxxxxxxx Replace the xxxxxxxx with the ID. That may give a general idea at least of how long ago the account was created. Aside from that you're out of luck. Generally most companies won't reveal that info about their users; invasion of privacy.