During the 1908 Olympics in London, the Russians showed up 12 days late due to the fact that they were using the Julian calendar instead of the Gregorian calendar.

During the 1908 Olympics in London, the Russians showed up 12 

In the 1500’s most Roman Catholic countries & Scotland adopted the Gregorian Calendar (established by Pope Gregory XIII to compensate for the errors in time that had built up over centuries) over the Julian Calendar (introduced by Julius Caesar in 45 BC) . A lot of protestant countries however, ignored this new calendar for another 200 or so years. England stuck to the Julian Calendar until 1751 before finally making the switch. Orthodox countries took even longer to accept the change in calendars. Russia, for one did not convert to the Gregorian calendar until after the Russian Revolution in 1917. The funny thing was, in 1908, the Russian Olympic team arrived 12 days late to the London Olympics because of it.