In, on, at: and how to pick the right one.
At
Structure: at + exact time or point
The class starts at 9am.
Precise clock times, and fixed points like “at night,” “at the weekend.”
On
Structure: on + days and dates
See you on Monday. / on July 4th
Days of the week and specific dates.
In
Structure: in + longer periods
She was born in 1995. / in the morning
Months, years, seasons, and parts of the day.
Memory Trick
Structure: IN the long stretch → ON the day → AT the exact dot
in 1995 → on July 4th → at 9am
Time gets smaller as you move from in, to on, to at.
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