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Search Results for "leap year day"
There are 569 Retriever pages mentioning "leap year day":
  1. Gregorian Calendar -- Leap Years
    The Gregorian solar calendar is an arithmetical calendar. It counts days as the basic unit of time, grouping them into years of 365 or 366 days. The solar calendar repeats completely every 146,097 days, which fill 400 years, and which ... happens to be 20,871 seven-day weeks. Of these 400 years, 303 (the "common years") have 365 days, and 97 - the leap years - have 366 days. This gives an average year length of exactly 365.2425 days - or 365 days, 5 hours, 49 minutes and 12 seconds.
  2. Julian Calendar -- Leap Years
    With the introduction of the Julian calendar a period of almost complete disorder in the Roman calendar came to an end. Until then, the beginning of the month was announced at the first visibility of the moon's crescent after new moon, though the year was reckoned depending on the sun. The lengths of the years in a four year cycle of this lunisolar calendar were 355, 377, 355, and 378days, which was almost four days longer than the true length of four years. Soon the calendar derailed because of leap years introduced to keep it aligned with the sun. In 47BCE, the calendar was in error by about three months.
  3. Dean Stockwell -- Quantum Leap
    Dean Stockwell (March 5, 1936 Hollywood, California - ) is an American actor best remembered for his role as Al Calavicci on the series Quantum Leap. Stockwell ... plays a [[Cylon] on the reimagined series Battlestar Galactica. Other notable genre appearances include The Twilight Zone, Mission: Impossible, Night Gallery, The Werewolf of Washington, Enterprise, and the 2004 film The Manchurian Candidate.
  4. The Rhino -- Years
    Following the triple-platinum success of "Barry Manilow: Music And Passion" -- released last year by Rhino -- this boxed set is the very first to spotlight Manilow's beloved television specials. The collection features "The First Barry Manilow Special" (1977), "The Second Barry Manilow Special" (1978), "The Third Barry Manilow Special" (1979), "One Voice" (1980) and "Barry Manilow: Big Fun On Swing Street" (1988).
  5. New Years -- January
    In Annunciation Style dating the new year started on 25 March, the feast of the Annunciation. This was used in many parts of Europe in the Middle Ages, and was the style introduced by Dionysius Exiguus in AD 525. Annunciation Style continued to be used in the Kingdom of Great Britain until January 1, 1752, except Scotland which changed to Circumcision Style dating on 1 January 1600. The rest of Great Britain changed to Circumcision Style on the 1 January preceding the conversion in Great Britain from the Julian calendar to the Gregorian calendar on 3/14 September 1752. The UK tax year still starts on 6 April which is 25 March + 12 days, eleven for the conversion from the Julian to the Gregorian calendar plus a dropped leap day in 1900.
  6. National Zoo -- Years
    The National Zoo is open every day of the year, except December 25. April 3 to October 31, the grounds are open 6 a.m. to 8 p.m. and the buildings are open 10 a.m. to 6 p.m. November 1 to April 2, the grounds are open 6 a.m. to 6 p.m. and the buildings are open 10 a.m. to 4:30 p.m.
  7. Benjamin Franklin (Franklin, Benjamin - Scientist) -- Years
    With America celebrating the tricentennary of Benjamin Franklin's birth this year a veritable flood of books have been published seeking to understand this fascinating figure. This book is the best of the bunch. While not a standard biography, Gordon Wood offers a penetrating analysis of Franklin by approaching Franklin's life through five transformations that he underwent: from his humble roots to become a man of means, from that to his enthusiasm for empire and from there to his adoption of the Patriot cause, then from there to his transformation into a diplomat and ultimately an American icon.
  8. Julian Calendar -- Pope Gregory Xiii
    [T]he Julian calendar year eventually proved to be slightly longer than the solar year. By the 16th century, the beginning of spring fell in early March. Pope Gregory XIII, acting on the advice of Christopher Clavius, therefore excised 10 days from the calendar by shortening October 1582, and he revised the leap-year rule: No leap years in centesimal years (e.g. 1700, 1800, 1900), except those divisible by 400 (e.g. 2000, 2400, 2800).
  9. Julian Calendar -- Gregorian Calendar
    The Julian calendar, introduced by Juliius Caesar in -45, was a solar calendar with months of fixed lengths. Every fourth year an intercalary day was added to maintain synchrony between the calendar year and the tropical year. It served as a standard for European civilization until the Gregorian Reform of +1582.
  10. Gregorian Calendar
    The Gregorian Calendar is the calendar currently in use in most of the world. It was decreed by Pope Gregory XIII in 1582 and is named for him. Like the Julian Calendar, the Gregorian calendar has 365 days per year. An extra "leap day" is added every 4 years, except when the year is divisible by 100 but not by 400. As a result, 3 leap days are skipped every 400 years. The average Gregorian calendar year is 365.2425 days long, a close approximation of the actual length of the astronomical year.
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