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from September 26, 1999
Last Document: May 13, 2012

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Sunday Herald, February 26, 2008

News

Leap Year Sunday Briefing Sunday Briefing Thirty Days Hath September, April, June and November: All the Rest Have Thirty-One, Except for February Alone, Which Hath Twenty-Eight Days Clear, and Twenty-Nine in Each. . .

OUR clocks are based on the rotation of the Earth around its axis and our calendar on the orbit of the Earth around the Sun. Unfortunately, the two don?t quite match. While the Earth rotates at almost exactly 24 hours per day, it travels around the Sun every 365.2422 days. This means that if we had the same number of days in each year, the calendar would drift, meaning that within 100 years, the calendar would be 24 days ahead of the seasons. Ancient cultures recognised this when it was commo...

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