《汉书·志·律历志下》
《春秋历》上说，周文王四十二年十二月丁丑朔旦冬至，是孟统的二会首。
《春秋历》，周文王四十二年十二月丁丑朔旦冬至，孟统之二会首也。
The "Spring and Autumn Calendar" says that in the forty-second year of King Wen of Zhou, on the first day of the winter solstice after the first day of the winter solstice, it is the second meeting of Mengtong.
<s>[INST] Translate the following passage from Classical Chinese to both modern Chinese and English, focusing on preserving the emotional tone in both translations: 《春秋历》，周文王四十二年十二月丁丑朔旦冬至，孟统之二会首也。 [/INST] Modern Chinese: 《春秋历》上说，周文王四十二年十二月丁丑朔旦冬至，是孟统的二会首。 English: The "Spring and Autumn Calendar" says that in the forty-second year of King Wen of Zhou, on the first day of the winter solstice after the first day of the winter solstice, it is the second meeting of Mengtong.</s>
Translate the following passage from Classical Chinese to both modern Chinese and English, focusing on preserving the emotional tone in both translations: 《春秋历》，周文王四十二年十二月丁丑朔旦冬至，孟统之二会首也。
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Modern Chinese: 《春秋历》上说，周文王四十二年十二月丁丑朔旦冬至，是孟统的二会首。 English: The "Spring and Autumn Calendar" says that in the forty-second year of King Wen of Zhou, on the first day of the winter solstice after the first day of the winter solstice, it is the second meeting of Mengtong.
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