No I'm not going mad lol, many years ago when we used the Roman Calendar New Years Day was on April 1st, after it got changed people still said happy new year on the 1st April that is how the phrase April fool came about. We still have a legacy from it to this day though, the new tax year starts in April. We also had less months in a year then 2 more got added, here is a link to a lot of it, very interesting. https://www.historyforkids.net/roman-calendar.html Col.
