The California month to month rental agreement, or “Tenancy at Will”, is a written understanding between a lessee (“Tenant”) and lessor (“Landlord”) for living in residential space for thirty (30) days at a time. Either party may decide to cancel the agreement with one another with at least one-months’ notice with the exception if the arrangement has been ongoing for more than a year, then it must be at least two (2) months’ notice.