Leap Day,闰日,指的是四年一次的2月29日,今天就是我们四年一次的闰日,关于这一天,有什么来历和传统呢? Leap Day, on February 29, has been a day of traditions, folklore and superstitions ever since Leap Years were first introduced by Julius Caesar over 2000 years ago. 自从2000多年前朱利叶斯·凯...
leap day是闰日的意思！ 今天就是2月29日！祝愿快乐！四年才有一次～～在公历（格里历）纪年中，有闰日的年份叫闰年，一般年份365天，闰年为366天。由于地球绕太阳运行周期为365天5小时48分46秒（合365.24219天）即一回归年，公历把一年定为365天。所余下的时间约为四年累计一天，加在二月里，所...
根据第二段中的“He decided that every four years an extra day would be added to the calendar on the advice of an astronomer, Sosigenes. (听从了一位名叫Sosigenes的天文学家的建议,他决定每四年年历上就多加一天。)”可知, Sosigenes想出了闰日的想法。故选A项。 (2)题详解: 推理判断题。
Have a look at some of the numbers, history and lore behind the (not quite) every four year phenom that adds a 29th day to February.
Contrary to what some might believe, however, not every four years is a leaper. Adding a leap day every four years would make the calendar longer by more than 44 minutes, according to the National Air & Space Museum. Later, on a calendar yet to come (we’ll get to it),...
The chances of being born on February 29, Leap Day, is 1 in 1,461, which means for the 4.8 million "leaplings" around the world who were born on Leap Day, their actual birthday only comes around once every four years. "Sunday Morning"
Because of this small(4)d ifference,almost every four years an extra day appears on the calendar.Over time,our seasons would fall(5)o ut of order without the leap day.Each calendar year is about six hours(6)l onger than 365 days. However,a leap day is not added every four year...
LIKE PRESIDENTIAL ELECTIONS, LEAP DAY COMES EVERY FOUR YEARSROBERT H. WILLIAMS Washington Post
And it includes a date that only comes along every four years — leap day, February 29th. This year that happens to be this Saturday. February ends on the 28th in non-leap years. So why do we have the extra day? It's the earth'...
Why Don't We Add a Leap Day Every 4 Years? If the tropical year wasprecisely6 hours longer than a calendar year with 365 days, we could use theJulian calendar, which adds aleap day every 4 years without exception. The deviation would grow to exactly 24 hours over 4 years, and Earth...