In which year was October ten days shorter?

1582 lost 10 days, 1582 directly jumped from 10 on October 4th to 10 on October 5th, because the calendar was changed.

In julian calendar's law, a year is divided into 12 months, odd-numbered months are 3 1 day, even-numbered months are 30 days except February, the average year in February is 29 days, and the leap year is 30 days, so the number of days in the whole year is 365 days in the average year, 366 days in the leap year, and the average annual length is 365.25 days.

In astronomy, the time for the earth to revolve around the sun is a real day, with a period of about 365.2422 days. Therefore, after using the julian calendar method, add 1 1 min 14 seconds every year. Because the error is not too big, it doesn't matter in the first few years. However, when the errors accumulate year after year, the julian calendar method is out of step with the actual solar year.

In the16th century, this deviation reached 10 days. So in 1582, the then Pope issued a papal decree on February 24, 2002, erasing 1582 from1October 5 to 14, so this1. 15821010.4 passed, and the next day was1015, so the calendar was synchronized with the solar year again. This is the common calendar in the world today-Gregorian calendar, or Gregorian calendar for short.

1582 memorabilia

65438+ 10/5-Russia ceded Livonia and Estonia to Poland.

February 24th-Pope Gregory XIII promulgated a new calendar, the current international Gregorian calendar.

June 10-Portugal declares independence.

2 1 year June (June 2nd, the tenth year of Tianzheng)-the change of Benneng Temple. Akechi Mitsuhide attacked Beno Temple in Kyoto, and Nobuyuki Oda committed suicide after burning it.

Thursday, October 4th, 65438/KLOC-0 (julian calendar)-Italy, Poland, Spain and Portugal set the next day as Friday, October 5th, 65438/KLOC-0.

Sunday, February 9th, 65438 (julian calendar)-The French set the next day as Monday, February 20th, 65438.

Matteo Ricci was admitted to China.