Time Expressions — In the Morning, At Night, At Three O'Clock

Master article use with time expressions: 'the' with parts of the day (morning, afternoon, evening), no article with 'at night', 'at midnight', 'at noon', and clock times.

Time Expressions: 'The' or No Article?

Time expressions in English split into two clearly defined groups for article use. The division is not semantic but lexical — it depends on which preposition introduces the expression and which specific time word is used. Learner corpus data confirms that 'in morning' (missing 'the') and 'at the night' (incorrect 'the') are among the most frequent time-expression article errors at B1–B2 level, often appearing together in the same sentence.

Parts of the Day: 'In' + 'The'

Morning, afternoon, and evening are parts of the day. With the preposition 'in', they always take 'the'.

I usually go for a walk in the morning.
She feels most energetic in the afternoon.
We have dinner together in the evening.

Fixed Time Points: 'At' + No Article

Night, midnight, noon, dawn, dusk, sunset, and sunrise are fixed time-point expressions with 'at'. No article is used.

She works at — night and sleeps during the day.
The shop closes at — midnight.
We went for a walk at — sunset.
The meeting is at — three o'clock. (clock times — never use 'the')

Common Mistakes

✗ I like to exercise in — morning. → ✓ I like to exercise in the morning.
✗ She works at the night. → ✓ She works at — night.
✗ The meeting is at the three o'clock. → ✓ The meeting is at — three o'clock.