公元前458年,凯撒引进了闰年的概念,在一年的最后一个月加上一天,也就是在二月加上一天。
3.How to calculate a leap year?
如何计算闰年?
Caesar declared that every year evenly divisible by four would be a leap year. While simple, this rule actually created too many leap years to keep the Roman and lunar calendars aligned. More than 1500 years later, a new formula was introduced with the Gregorian Calendar, which we still use today。
凯撒制定的《儒略历》规定每四年一闰。这种方法虽然简单,但是与阴历相比,《儒略历》会造成过多的闰年。于是,在1500年后,一种新的纪年方法,即现在使用的由罗马教皇格里高利十三世完善修订的格里历。
4.What if you are born on February 29?
你是那个出生在2月29日的幸运儿吗?
(1) There is 1 in 1461 the chances of being born on leap day。
出生在2月29日的概率是每1461人中有一个。
(2) 4 million people in the world were born on February 29th。
世界上有约400万人出生在2月29日这天。
5.Leap year records
不可思议的闰年出生记录
(1) most children born on February 29
在2月29日生过最多小孩的人
Mrs. Karin Henriksen (Norway) gave birth to 3 children on consecutive Leap Days;her daughter in 1960 and her sons in 1964 and 1968.
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