the lunar calendar

基本解释

What's the date of May Day according to the lunar calendar this year?
今年五一是阴历几号？
In the lunar calendar, the years are designated by the Heavenly Stems and Earthly Branches.
阴历用干支纪年。
《新英汉大辞典》
OTHERWISE a bright, brash and sometimes stifling city, once every autumn—on the middle day of the eighth month of the lunar calendar—Seoul becomes a ghost town.
别看平常首尔是一个喧嚣、快节奏甚至有时令人窒息的城市，可每年一到了阴历八月十五，首尔一下子便冷清了下来。

It also abandoned the lunar calendar that had been used from ancient times.
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If you mine the newspaper archives for last year, or the year before (well, not exactly, you need for Chinese New Year, which being based on a lunar calendar is a movable feast) you will see many a story about how factories were desperately short of the labour they needed in the big Chinese manufacturing towns.
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