每一平年有365天，即52个星期加1天，也就是说下一年的起始星期数是当前年起始星期数加1；如果是闰年那么还要额外加1天。
https://zh.m.wikipedia.org/zh-hans/%E6%98%9F%E6%9C%9F%E7%9A%84%E8%A8%88%E7%AE%97
Created
January 31, 2023 08:48
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一年有多少个周
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