The 1st Parliament of King Charles II (the 'Convention Parliament') which met from 25 April 1660 until 29 December 1660.
Note that although Charles II's reign began de facto with the Restoration in 1660, it was considered to have begun de jure in 1649 with the execution of Charles I; as such, these acts are the regnal year 12 Cha. 2.
This session was traditionally cited as 12 Car. 2, 12 Chas. 2 or 12 C. 2; it is listed in the "Chronological Table of the Statutes" as 12 Car. 2.