The Saros number of the solar eclipse series which began on 1993 March and ended on 713 April. The duration of Saros series 27 was 1280.1 years, and it contained 72 solar eclipses. Further, the Saros number of the lunar eclipse series which began on 1944 July and ended on 411 January. The duration of Saros series 27 was 1532.5 years, and it contained 86 lunar eclipses.
The number of outs in a regulation baseball game for each team at all adult levels, including professional play, is 27.
In auto racing, 27 and 28 were Ferrari Formula one numbers from 1981 to 1995 except in 1990 when reigning WC Alain Prost had the right to use #1 and drove for the team, Nigel Mansell used #2. Popular Canadian driver Gilles Villeneuve used the number on his final days in F1. Later it was adopted by his son Jacques Villeneuve to claim the 1995 CART World Series title, and Canadian IndyCar driver James Hinchcliffe. Jean Alesi, another popular Ferrari driver was the last one ever to use the number back in 1995, also winning the last race with it (as of August 2011), the Canadian GP. Ayrton Senna won his second Formula One World Championship using the mystic number 27 in 1990 in a McLaren Honda, as mentioned, the only time Ferrari didn't use the number during that period.
The Toronto Maple Leafs have a policy of not retiring numbers unless the player honoured either died or suffered a career-ending incident while a member of the team. Other players whose numbers would otherwise be retired instead have their numbers enshrined by the team as "Honoured Numbers", which remain in circulation for future players. The number 27 is currently honoured for Frank Mahovlich and Darryl Sittler.