why dayjs('2024-12-31').locale('zh-cn').week() return 1 not 53

[lvqingxiang]

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Expected behavior
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Information

• "dayjs": "^1.11.13",
• OS: mac
• Browser [e.g. chrome 62]
• Time zone: zh-cn

[Robert-Du0001]

I also just found the same issue.😂

[fanruinet]

This is by design.
dayjs.week() assumes January 1st is the first week of year. So 2024-12-31 belongs to week 1 of year 2025.