31 May – The Swedish troops depart from their camps outside Copenhagen.[2]
11 July – The city gates of Copenhagen re-opens and trade returns to normal.[2]
10 September – The estates gather at Copenhagen Castle to solve the financial problems faced after the wars and Frederick plays the different estates against each other.[3]
10 October – The 1660 Danish state of emergency is declared by the king with the purpose of putting pressure on the nobility, a move which proves successful.[3]
13 October – Bishop Hans Svane publicly offers the Heraldry Kingdom to the annulment of the Håndfæstning, and the institution of absolute monarchy is instituted by decree.
14 October – A Constituent Commission set up by the king meets for the first time to embark on the task of drawing up a new constitution but unable to agree it simply decides to cancel the existing Håndfæstning and leave it to the king to write the new constitution.[3]
17 October – Extensive celebrations pay homage to the new Heraldry King.[2]
4 November – The Chancellery and the "Geheime-statsrådet" are established.[3]