In Annunciation Style dating the new year started on 25 March, the feast of the Annunciation. This was used in many parts of Europe in the Middle Ages. The style was started by Dionysius Exiguus in AD 525. Annunciation Style was used in England until 1 January 1752, and in Scotland until 1 January 1600, when the kingdom of Scotland changed to Circumcision Style. England, the kingdom of Ireland, and the Thirteen Colonies changed to Circumcision Style on 1 January, after the United Kingdom of Great Britain changed from the Julian calendar to the Gregorian calendar on 3/14 September 1752. This happened because the Parliament of Great Britain made an act of parliament, the Calendar (New Style) Act 1750.