<Tr> <Th> Most wins </Th> <Td> Joey Dunlop 26 (1977--2000) </Td> </Tr> <Tr> <Th> Lap record </Th> <Td> Peter Hickman 16m42. 778s--135.452 mph (217.989 km / h) (2018) </Td> </Tr> <P> The International Isle of Man TT (Tourist Trophy) races are an annual motorcycle sport event run on the Isle of Man in May / June of most years since its inaugural race in 1907, and is often called one of the most dangerous racing events in the world . </P> <P> The Isle of Man TT is run in a time - trial format on public roads closed to the public by an Act of Tynwald (the parliament of the Isle of Man). The event consists of one week of practice sessions followed by one week of racing . It has been a tradition, perhaps started by racing competitors in the early 1920s, for spectators to tour the Snaefell Mountain Course on motorcycles during the Isle of Man TT on "Mad Sunday", an informal and unofficial sanctioned event held on the Sunday between' Practice Week' and' Race Week' . </P>

When did the isle of man festival of motorcycling start