Lease Termination Eviction

[John Mano]

I have a not so desirable tenant who is on month-to-month lease.  I have sent him a certified letter for terminating the lease with 30 days notice that expires Nov 30.  He told me he's unable to move out by Nov 30 and has asked for extension so he can save and look for new place.  If I give him till Jan 1 to move out and make him sign a contract agreeing to it, would this contract be enforceable?  If not, will this contract be useful when I file for eviction?  Do I need to send him another termination letter on Jan 1 with 30 days notice before I can file for eviction?  Thank you for your feedback.