The transition from Julian to Gregorian Calendar: http://www.rundetaarn.dk/engelsk/observatorium/gregorian.html

September 14th 1752 - England and Scotland with colonies. Thursday, September 14th came after Wednesday, September 2nd.

Hmm, undoubtedly this Q will come once again. But for a different country... like Holland. 😉

(Which should be The Netherlands by the way, but I digress)