一篇关于公历和农历历法的科普文章，解释了2024年为什么会有366天的原因。
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文章详细介绍了我们使用的公历和农历历法，重点解释了闰年的概念以及2024年为什么会有366天的原因。通过这篇文章，读者可以了解到历法的基本原理和闰年的计算方式。
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