The Prorogation Act 1867 (30 & 31 Vict. c.81) is an Act of the Parliament of the United Kingdom which is still in force in the United Kingdom with amendments. It was passed to simplify the forms of prorogation during a recess of Parliament. Prorogation is the period from the formal end of a parliamentary session to the opening of the next session. The Act allowed the period of a prorogation to be extended to a day at least 14 days later. The Representation of the People Act 1918 changed the period for such an extension from 14 days to at least 20 days.