That's an excellent summary of how the modern calendar came about. Supposedly when Pope Gregory Xlll cut the 11 days from September, 1752, there were a lot of very unhappy people (even reports of riots) for various reasons that ranged from accusations it was part of Catholic plot, to landlords shortchanging tenants all the way to people thinking their lives were being shortened!
RE: TIMEKEEPING: A BRIEF HISTORY OF CALENDARS.