Try on this in Linux or UNIX platform:
[email protected] [~]$ cal 9 1752 September 1752 Su Mo Tu We Th Fr Sa 1 2 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 [email protected] [~]$
Surprised? Where are those missing 11 days?
A month with whole of eleven days missing. This was the time England shifted from Roman Julian Calendar to the Gregorian calendar, and the king of England ordered those 11 days to be wiped off the face of the month of September of 1752. And yes, the workers worked for 11 days less, but got paid for the entire 30 days. And that’s how “Paid Leave” was born.