二十日はつか

は

つ

か

Common wordJLPTN5

Meanings

noun

20th day of the month

Refers specifically to the 20th day of a month. The reading はつか is irregular and must be memorized.

会かい議ぎは来らい月げつの二十はつ日かです。
The meeting is on the 20th of next month.
二十はつ日かまでにレポートを提てい出しゅつしてください。
Please submit the report by the 20th.

noun

20 days

Indicates a duration of twenty days. The reading にじゅうにち is also possible but less common; はつか is the standard reading for this meaning as well.

この薬くすりを二十はつ日か間かん飲のみ続つづけてください。
Please continue taking this medicine for 20 days.
二十はつ日かも雨あめが降ふり続つづいている。
It has been raining for 20 days straight.

See all 17 example sentences ›

Usage patterns

〈時とき〉〉の二十日はつかthe 20th of (a given month)
今こん月げつの二十はつ日かに会かい議ぎがあります。
There is a meeting on the 20th of this month.
〈事こと〉〉に二十日はつかかかるto take twenty days (to do something)
この工こう事じの完かん成せいに二十はつ日かかかった。
It took twenty days to finish this construction work.
二十日はつかぶりに〈動詞どうし〉〉to do something for the first time in twenty days
二十はつ日かぶりに雨あめが降ふった。
It rained for the first time in twenty days.

Kanji

日day, sun, Japan
二two, two radical (no. 7)
十ten
廿twenty

Don't confuse with· 5

二十歳はたちN5
二十日 (はつか) means the 20th day of a month or a 20-day duration, while 二十歳 (はたち) means '20 years old'; both use an irregular reading of 二十 but refer to completely different things.
十とお日かN5
二十日 (はつか) is the 20th day/20 days, while 十日 (とおか) is the 10th day/10 days; both are irregular date readings that beginners often mix up.
２５にじゅうご日にち
２５日 (にじゅうごにち) is read regularly, while 二十日 (はつか) uses an irregular traditional reading for the 20th day/20 days, so learners often mix up the reading pattern.

Show 2 more

２１にじゅういち日にち
２１日 (にじゅういちにち) uses the regular number+日 reading, while 二十日 (はつか) is an irregular native-Japanese reading that learners often mistakenly try to apply to 21日 as well.
八よう日かN5
八日 (ようか) and 二十日 (はつか) are both special native-Japanese day readings that don't follow the regular Sino-Japanese counting pattern, so beginners often confuse them.

Written forms

二十日
- はつか
  Standard kanji spelling; preferred in formal writing.
- にじゅうにち
  irregular kana usage
はつかUsage100%
Kana spelling; used for clarity or in informal writing.
２０日
- はつか
  Common in schedules, dates, and digital contexts.
- にじゅうにち
  irregular kana usage
二〇日
- はつか
  Uncommon variant using the kanji 〇 for zero.
- にじゅうにち
  irregular kana usage
廿日
- はつか
  Archaic kanji form; rarely used in modern Japanese.
- にじゅうにち
  irregular kana usage
にじゅうにち
irregular kana usage

Etymology

The reading はつか is a native Japanese (kun'yomi) reading for 二十日, combining 二十 (twenty) and 日 (day). The irregular sound change from ふたそか to はつか is a historical development.