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PHYS 162 Elementary Astronomy - page 29 / 29

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PHYS 162 Class 1

PHYS 162 Class 1

365.242 days in year- not on tests

If normal year has 365 days need extra 24 days/century and extra 2 days/millennium

46 BC Julius Caesar (really Sogigula an Egyptian) - Julian calendar with leap day every 4 years. But 8 too many days every 1000 years so….

Gregorian calendar adopted

     Spain and Catholic Europe      1582

     England                                    1751

     Russia                                      1918

  which immediately skipped 10 days (in 1582). No leap day on century years 1700, 1800, 1900, 2100, 2200 (just those divisible by 400 like 2000)

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