Thirty days has September, April, June and November all the rest have thirty one except for February alone which has but twenty eight days clear and twenty nine in each leap year. In 1752 Britain finally agreed to give up on the Julian Calendar. Something a great deal of the Western World had agreed to do in 1582.
And the thing about it was, in order to introduce the Gregorian Calendar to the
British Public it was necessary to lose eleven days. Wednesday the 2nd of
September 1752, it was decided, would be followed by Tuesday 14th of September
1752. A source of great distress for many Britons who rightly believed the
government had stolen eleven days of their lives. Not to mention the number of
birthdays that went missing.