Definition

1. Noun:
   • Day and night: A compound noun meaning the continuous cycle of a full day and night, or a 24-hour period. It emphasizes the entirety of time or continuous action spanning both periods.

Usage Examples

• Noun:
  • Công nhân làm việc suốt nhật dạ để hoàn thành dự án. (The workers worked day and night to complete the project.)
  • Hành trình kéo dài ba nhật dạ. (The journey lasted three days and nights.)

Advanced Usage

• This term is classical and literary. In modern spoken Vietnamese, "ngày đêm" is more common. "Nhật dạ" is often used in formal writing, poetry, or to convey a timeless, continuous effort.
  • Tình yêu ấy vẫn cháy trong lòng cô suốt nhật dạ. (That love still burns in her heart day and night.)

Variants and Related Words

• Ngày đêm (n): The modern, common synonym for "day and night."
  • Anh ức chăm sóc mẹ ốm ngày đêm. (He took care of his sick mother day and night.)

Synonyms

• Day and night: The continuous period of a full day.
• Around the clock: Continuously, all day and night (emphasizing non-stop action).

Related Idioms

• Suốt ngày đêm: Equivalent to "day in and day out," meaning continuously without stopping.
  • Tiếng ồn từ công trường vang lên suốt ngày đêm. (The noise from the construction site sounded day in and day out.)