Seeing as this is the start of March, one should also note that the year used to end in March (hence the old end of tax year at the start of April), not December. March 1550 was immediately followed by April 1551. There is a detailed explanation in the money / coin section in the National Museum Collins Barracks.Originally posted by Groundhog
Britain and Ireland adopted the Gregorian calendar in 1752. There was no September 3rd to 13th that year. Sept 2nd was followed by Sept 14th. There were cries of Give us our eleven days back from the gullible who thought their lives were now 11 days shorter than they should be etc. One effect of this change in Ireland is that the Battle of the Boyne is celebrated by Orangemen on July 12th though it was actually fought on July 1st 1690.