How to say "days" in Japanese

• 月日つきひJLPT N2approx.Common
  nounDays as time itself — the days and years as they pass — or one's days in the sense of one's life. Suits reflection on how time has gone by.
  その二ふたつの事件じけんの間あいだには何なん年ねんもの月日つきひが経たっている。↗

  Years intervene between the two incidents.
• 日ひJLPT N4approx.Common
  nounA day, or days: use it where English 'days' refers to particular days, or days of a certain kind, rather than to a stretch of time taken as a whole.
  この服ふくは寒さむい冬ふゆの日ひには向むかない。↗

  These clothes are not appropriate for a cold winter day.
• 日々ひびJLPT N1approx.Common
  nounDays as a stretch of time with its own character — the days of one's youth, for example. Use it for a period of days taken as a whole rather than for single days.
  私わたしたちが一緒いっしょに暮くらした楽たのしい日々ひびを覚おぼえている。↗

  I remember the happy days we spent together.

Use 月日 for days as time itself — the days and years of one's life, 日々 for a stretch of days viewed as a period, as of one's youth, and 日 for a day, or for particular days.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 月日つきひtime
• 日ひday
• 頃おいころおいtime
• 日子にっし(number of) days
• 日々ひびdays (e.g. of one's youth)
• 日にちひにち(number of) days