星期日
xīng qī rì
In real, traceable use. Part of the curated seed collection; community review is coming.
Sunday, in the form used in writing and in formal speech. In conversation 星期天 is more usual. Monday to Saturday are simply numbered, 星期一 to 星期六, and only Sunday ends in a word for 'day' instead of a number.
Chủ nhật, cách gọi dùng trong văn viết và khi nói trang trọng. Nói chuyện hằng ngày thì hay dùng 星期天. Các ngày khác được đánh số: 星期一 là thứ Hai, 星期六 là thứ Bảy, nghĩa là số trong tiếng Trung luôn kém tiếng Việt một đơn vị.
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 “星期日” mean?
Sunday, in the form used in writing and in formal speech. In conversation 星期天 is more usual. Monday to Saturday are simply numbered, 星期一 to 星期六, and only Sunday ends in a word for 'day' instead of a number. Literally: star period day
Is “星期日” formal or informal?
星期日 is generally neutral.