中旬 zhōngxún middle third of a month
How to remember 中旬: 中 middle + 旬 ten-day period = middle third of a month.
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How it is used
- The middle ten days of a month (roughly days 11-20) - 七月中旬 (qīyuè zhōngxún) mid-July.
- The center piece of the 上旬/中旬/下旬 set that divides a month into thirds; standard in schedules and news.
- 旬 is a bound unit meaning a ten-day span.