Time zone error

I get an error

When I select time zone and when I try to save profile edit I get a white screen and it waits forever and doesnt save I think theirs some thing wrong with the timezone field? where did it come from I never put it in the profile? And I cant find it in cb fields?

0 - DateTime::__construct(): Failed to parse time string (Accept Terms and Conditions and Privacy Policy ) at position 0 (A): The timezone could not be found in the database

Thanks

Edit your terms and conditions fields and empty the Default Registration Value or set it strictly to 1 or 0 (if you want the default to actually do anything).