Under Colorado law, the following rules apply to cancelling a Month-to-Month Lease:
(a) A tenancy for one year or longer, 91 days;
(b) A tenancy of six months or longer but less than a year, 28 days;
(c) A tenancy of one month or longer but less than six months, 21 days;
(d) A tenancy of one week or longer but less than one month, 3 days;
(e) A tenancy for less than one week, 1 day.