When the world changed from the Jullian Calander to the Gregorian Calender, 11 days were skipped
In most of Western Europe The Day After March 10,1582 was March 21, 1582
In England the and US Colonies September 2, 1752 was followed by Sepetember 14, 1752
And in Russia Janauary 31, 1918 was Followed by February 14, 1918