日
rì
In real, traceable use. Part of the curated seed collection; community review is coming.
The day of the month in writing, as on a calendar, a form or a notice. Dates run from large to small: 五月一日 is 1 May. In speech people say 号 instead (五月一号). Inside words it also means 'sun' or 'day', as in 生日 'birthday'.
Ngày trong tháng khi viết, như trên lịch, giấy tờ hay thông báo. Ngày tháng viết từ lớn đến nhỏ: 五月一日 là ngày 1 tháng 5. Khi nói, người ta dùng 号 (五月一号). Trong từ ghép, chữ này còn có nghĩa “mặt trời”, “ngày”: 生日 (sinh nhật).
NounRegister: neutral
Examples
Editorial example (illustrative, not a corpus attestation) — awaiting a native-speaker check
Sources & notes
Hán-Việt bridge batch 064 (2026-11-14). Headword, Traditional form and pinyin checked against CC-CEDICT (CC BY-SA 4.0) source ↗ · Hán-Việt reading: Unihan kVietnamese source ↗ · No Vietnamese entry is linked as its twin; the Hán-Việt reading is given character by character. Definition, literal gloss and example sentence are original; the example has not had a native-speaker check yet.
Common questions
What does “日” mean?
The day of the month in writing, as on a calendar, a form or a notice. Dates run from large to small: 五月一日 is 1 May. In speech people say 号 instead (五月一号). Inside words it also means 'sun' or 'day', as in 生日 'birthday'.
Is “日” formal or informal?
日 is generally neutral.