Cal ho na ho
Are you aware of any date in history when nothing, absolutely nothing happened, literally? Well I was not aware of it and the answer unexpectedly came from Unix. On the Unix prompt if you do a ‘cal 9 1752’ you get the following calendar.
The missing days owe it to the Gregorian Reformation when the King of England decreed that the days from 3rd to 13th be knocked off the calendar month in order to adjust the days while switching from Julian to Gregorian calendar.
A funnier explanation for the eliminated days is given here.