[Henchman]

It is difficult to pin the date at exactly 1178. It depends on the day in 1178, as there were calendar adjustments after that :D

[SunkenCiv]

Yeah, in the English-speaking world, the adjustment was made in October 1752. Sooo, George Washington et al generally wrote their birthdays both ways after that time. The adjustment took place earlier (by a century or so) in most Catholic countries. Sweden (I think it was) adjusted its calendar, then adjusted it back, then after a couple other tries got it on track. Russia never changed its calendar, leaving that task to the Soviet Union.

There's a maverick guy who claims that Columbus' initial landfall was at Egg Island (he's the only one who thinks so, other than his small band of followers), and one of his arguments actually has some bearing -- that Columbus was using the pre-adjustment calendar, which means we celebrate Columbus Day on the wrong day. ;')