第一，就是他编制的历法《太初历》。

The first achievement is the "Taichu Calendar" that he made.

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在这里我们首先来认识一下《太初历》。

First let's have a basic understanding of this calendar.

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落下闳在制定太初历时，改变了旧的历日制度，规定每年以孟春正月朔日为岁首，被汉武帝采用。

Luoxia Hong changed the old calendar and made the first month of spring as the beginning of a year, which was employed by Emperor Wu of han.

youdao

落下闳在制定太初历时，改变了旧的历日制度，规定每年以孟春正月朔日为岁首，被汉武帝采用。

Luoxia Hong changed the old calendar and made the first month of spring as the beginning of a year, which was employed by Emperor Wu of han.

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