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The Rata Die method works by adding up the number of days d that has passed since a date of known day of the week D. The day of-the-week is then given by (D + d) mod 7, conforming to whatever convention was used to encode D. For example, the date of 13 August 2009 is 733632 days from 1 January AD 1. Taking the number mod 7 yields 4, hence a ...
December 18 is the 352nd day of the year (353rd in leap years) in the Gregorian calendar; 13 days remain until the end of the year. Events [ edit ] Pre-1600 [ edit ]
Its last day is the Sunday nearest to 31 December. It has 28 December in it. Hence the earliest possible last week extends from Monday 22 December to Sunday 28 December, the latest possible last week extends from Monday 28 December to Sunday 3 January. If 31 December is on a Monday, Tuesday, or Wednesday it is in W01 of the next year.
Since December 12 is a doomsday, December 25, being thirteen days afterwards (two weeks less a day), fell on a Saturday. Christmas Day is always the day of the week before doomsday. In addition, July 4 ( U.S. Independence Day ) is always on the same day of the week as a doomsday, as are Halloween (October 31), Pi Day (March 14), and December 26 ...
Current events/2009 December 18. Thirty world leaders present in Copenhagen for the United Nations Conference on Climate Change agree on a draft accord. ( The Sydney Morning Herald) (Forbes.com "Silver Lining In Copenhagen 'Fiasco'") (AllAfrica.com "Copenhagen Accord Politically Significant But Not Legally Binding") (Associated Press "China ...
In Northern Ireland and the Republic of Ireland in 2008, Saint Patrick's Day (Monday 17 March) fell six days before Easter (Sunday 23 March), creating a three-day week (Tuesday 18 – Thursday 20 March). This will next happen in 2035, when Saint Patrick's Day falls on Saturday, so the public holiday is moved forward to the following Monday 19 ...
The December 2009 North American blizzard was a powerful nor'easter that formed over the Gulf of Mexico in December 2009, and became a major snowstorm that affected the East Coast of the United States and Canadian Atlantic provinces. The snowstorm brought record-breaking December snowfall totals to Washington, D.C., Baltimore, and Philadelphia .
Mainstream Top 40 number-one songs of 2009. This is a list of songs which reached number one on the Billboard Mainstream Top 40 (or Pop Songs) chart in 2009. During 2009, a total of 20 singles hit number-one on the charts.
The winter solstice occurs during the hemisphere's winter. In the Northern Hemisphere, this is the December solstice (December 21, December 22, or December 23) and in the Southern Hemisphere, this is the June solstice (June 20, June 21, or June 22). Although the winter solstice itself lasts only a moment, the term also refers to the day on ...
The 2009 United Nations Climate Change Conference, commonly known as the Copenhagen Summit, was held at the Bella Center in Copenhagen, Denmark, between 7 and 18 December. The conference included the 15th session of the Conference of the Parties (COP 15) to the United Nations Framework Convention on Climate Change (UNFCCC) and the 5th session ...