我们知道公历大月为31天,小月为30天,而唯独二月却只有28天(闰年除外),这是为什么呢?原来公元前46年罗马皇帝凯撒修改历法时,本来规定每年12个月里,逢单月是大月31天,逢双是小月30天,二月是逢双也是30天。这样,大小各六个月,记起来方便。但这样算起来,一年共有366天,比一年应有的 We know that the Gregorian calendar for the 31 days, 30 days for the Satsuki, but only in February only 28 days (except for leap years), which is why? The original 46 BC BC, the Roman emperor Caesar calendar revision, originally provided for 12 Month, every single month is the big 31 days, every pair of small 30 days, February is every double is 30 days. In this way, the size of six months, remember convenient. But in this way, a total of 366 days a year, more than a year should be