What does 日曜 mean?
日曜 is a Japanese noun meaning “Sunday (short form)” in English. It is written as 日曜 in kanji, にちよう in hiragana, and nichiyou in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
銀行は日曜にはやってません。
The bank isn't open on Sundays.