Olympiad beginning on the opening of the Olympic Games for the summer sports. The first modern Olympiad began in 1896, the second in 1900, and so on (the 31st began in 2016: see the Olympic Charter). The ancient and modern Olympiads would have synchronised had there been a year zero between the Olympiad of 4 BC and the one of 4 AD. But as the Gregorian calendar goes directly from 1 BC to 1 AD, the ancient Olympic cycle now lags the modern cycle by one year. An ancient Olympiad was a period of four years grouped together, counting inclusively as
Science Olympiad for following years than pilot events. Almost all of the Trial events from recent National tournaments have become official events within a few years of the tournament, while the same is not true for almost any of the pilot events. Teams are hosted by the school from which the participants attend. Science Olympiad is most often run as an after-school extracurricular activity, but some schools offer Science Olympiad classes that allow students to receive academic credit for participation. A teacher, parent, or student (usually a volunteer) coordinates the team in practice and preparation for the competition. Often there are others