未來500年的閏月

沒 Fact check:

Astropixels 月相計算至 4000年

天文台：

由於計算數十年後的月相及節氣時間可能會有數分鐘的誤差，若新月(即農曆初一)或節氣時間很接近午夜零時，「對照表」內相關農曆月份或節氣的日期可能會有一日之差別。

置閏會是 timezone specific, 即 UTC+9 eg 日本的置閏跟 UTC-8 會不同

Aka 萬年曆惹的禍

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