My question involves landlord-tenant law in the State of: California
We had tenants who were six months into a nine month lease. They moved out. The lease states that they are responsible for utilities and maintenance (in addition to rent) until the end of the lease. We got a new renter who took the property two months after the old renters left (they returned the keys about half way through the first month.)
My question is this: when does their tenancy officially end? When they moved out? They didn't surrender the keys and indicated they were coming back to clean at that time. When they sent us the keys several weeks later? Or when the new tenants moved in and their obligation to the lease ended? Or is there another option?
Thank you so much!

