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润年全年有多少天

更新时间: 2021-03-11 03:08:00     

1、366天;

2、闰年有366天,闰年的存在是为了弥补因人为历法规定造成的年度天数与地球实际公转周期的时间差,通常每四年中有三个平年一个闰年,在公历纪年法中,能够被4整除但不能被100整除的年份为普通闰年,能被400整除的为世纪闰年。

关键词: 全年 多少

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