What did many people "lose" as a result of a change in 1752 in England and the English Colonies and 1582 elsewhere in Europe
Will post an interesting link (in the Computer Websites Forum) when I get the answer to see if the AP members are winners or losers(is a small download) if they lived in those years
Ps I don't know the Complete facts. I think there were no gainers only Losers!

11 days: the calendar was changed from Julian to Gregorian, belatedly,here then. There was an effort made to stop rents and other dated payments being charged for fewer days. That is why our tax year in the UK begins and ends when it does. The English fiscal year was dated to March 25th. This was redated to its present date April 5th.
The notion that there were riots in protest is misconceived. There is a Hogarth print showing rioting peasants yelling for the return of their 'lost' days but that is a joke about stupidity, not a representation of historic fact.

Well done Fred
Now Check out the calendars for those years plus many more facts and Figures (1.8 MB download)on this link