日曜|にちようnichiyou[3]nakadaka (mid-high)

1. nounSunday
   銀行ぎんこうは日曜にちようにはやってません。↗

   The bank isn't open on Sundays.

• Synonym日曜日にちようびNeutralThe full, neutral word for Sunday, at home in any context from casual conversation to formal writing; 日曜 is simply this word with the final 日 dropped.

Both mean Sunday: 日曜日 is the full, neutral form usable anywhere, while 日曜 is it with the final 日 dropped; either works in speech, but 日曜日 is the safer written choice.

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

1. 太陽たいよう。
2. 日曜日にちようび。