Did they really? Weird.Also, what was that period in the 15th or 16th century when they got rid of like 3 weeks in September to bring everything into alignment?
Who is in charge of stuff like that? Didn't they add a second to the end of last year? Who are "they," and why do they have the power to alter time?
Found it:
In order to make the calendar adjustment in 1582, ten days were eliminated from October. Thus 4 October 1582 was followed by 15 October 1582.
http://www.ancestry.com/learn/library/article.aspx?article=3358