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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.
The Gregorian calendar, like the Julian calendar, is a solar calendar with 12 months of 28–31 days each. The year in both calendars consists of 365 days, with a leap day being added to February in the leap years. The months and length of months in the Gregorian calendar are the same as for the Julian calendar.
In other words, the Julian calendar gains 3.1 days every 400 years. Gregory's calendar reform modified the Julian rule, to reduce the average length of the calendar year from 365.25 days to 365.2425 days and thus corrected the Julian calendar's drift against the solar year: the Gregorian calendar gains just 0.1 day over 400 years. For any given ...
A calendar date is a reference to a particular day represented within a calendar system. The calendar date allows the specific day to be identified. The number of days between two dates may be calculated. For example, "25 May 2024" is ten days after "15 May 2024". The date of a particular event depends on the observed time zone.
Wright Brothers Day (United States) December 18. International Migrants Day (United Nations) National Muffin Day (Brazil) December 19. Goa Liberation Day (Goa, India) National Heroes and Heroines Day ; December 20. Abolition of Slavery Day, also known as Fête des Cafres (Réunion, French Guiana) Bo Aung Kyaw Day
Federal holidays in the United States are 11 calendar dates designated by the U.S. federal government as holidays. On these days non-essential U.S. federal government offices are closed and federal employees are paid for the day off.
The issue spans the changeover; the date heading reads: "From Tuesday September 1, O.S. to Saturday September 16, N.S. 1752". [1] Old Style ( O.S.) and New Style ( N.S.) indicate dating systems before and after a calendar change, respectively. Usually, they refer to the change from the Julian calendar to the Gregorian calendar as enacted in ...
Independence Day: 6 December: 1917 Russian Soviet Federative Socialist Republic: Finnish Declaration of Independence. Gabon: Independence Day: 16-17 August 1960 France: Effective date of the agreement with France signed on 15 July. Gambia, The: Independence Day: 18 February: 1965 United Kingdom: Effective date of the Gambia Independence Act ...
14:14. Illumination of Earth by the Sun on the day of the December solstice. The December solstice, also known as the southern solstice, is the solstice that occurs each December – typically on 21 December, but may vary by one day in either direction according to the Gregorian calendar.
December (from Latin decem, "ten") or mensis December was originally the tenth month of the Roman calendar, following November ( novem, "nine") and preceding Ianuarius. It had 29 days.