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2020-07-07 11:45:09 +08:00

回复了 leoninmin 创建的主题 Google Google 今天上了七夕的 doodle，哈哈哈！

@hantsy
24 节气在古代是指导农业生产的。农业生产最关键的日照、雨水、温度都是直接被地球公转影响的。现代公历基本是按公转定的，和节气差不了几天很正常。
但是公转对普通人来说是非常难观测的，古代似乎是观测北斗星的位置？然后官方发布。对普通人来说，观察月亮盈亏最简单，所以日常很多时候都是用农历的（也就是阴历，月亮历）
大概意思应该是这样。网上挺多人科普过这个话题的。感兴趣可以自己查查

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