Although most modern calendar years have 365 days, a complete revolution around the Sun (one solar year) takes approximately 365 days and 6 hours.An extra 24 hours thus accumulates every four years, requiring that an extra calendar day be added to align the calendar with the Sun's apparent position.Thus, 1700, 1800, and 1900 did not contain a leap day; neither will 2100, 2200, and 2300. February 29 is the 60th day of the Gregorian calendar, in such a year, with 306 days remaining until the end of the year.In the Chinese calendar, this day will only occur in years of the monkey, dragon, and rat.
In the spirit of TED’s mission, “ideas worth spreading,” the TEDx program helps communities, organizations and individuals produce TED-style events at the local level.
Meetings are also sometimes held jointly with other societies and members can take part in events such as the annual West London Local History Conference.
From time to time we organise guided walks and visits to local houses and buildings of historic interest.
The Henriksen family from Andenes, Norway currently holds the official record for the most number of children born in one family on leap day.
Karin Henriksen gave birth to three children on February 29; her daughter Heidi in 1960 and her sons Olav and Leif-Martin in 19.