Colorado Revised Statutes Title 39. Taxation § 39-11-110. When public auction can be held

If, from any cause, the tax lien on real property cannot be duly advertised and offered for sale at public auction on or before the second Monday of December, it is the duty of the treasurer to hold the public auction on any subsequent day in which it can be held, allowing time for the publication of notice as provided in section 39-11-102.