Colorado month-to-month lease termination

[Grayson Hussey]

I've just inherited tenants on month-to month leases in a duplex in Denver. The leases are 1st of the month to last day of the month. I need to get the units vacated so I can start renovations and I want to make sure I'm doing it right. 

My understanding of CO law is that 10-day notice is all that is needed for MtM leases. The tenants have been at the location for a while and I'm not ready to begin rehab yet, so I want to give them notice that they need to vacate no later than April 8th. If I deliver the notices tomorrow, the 15th of March, would that be legal?