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Emily_ Posted 20 years ago
Grammar

on/in

Hi.

"The library is only open on/in weekday mornings now". The preposition relates to "weekday" or "mornings"?

Thank you.
  

Top answer

on weekday (mornings).

  • on weekday (mornings).
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2 Answers
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Hi Emily

Some examples of how to express time:
in the morning(s)
in the afternoon(s)
in the evening(s)
at noon, at midday
at night, in the night, sometimes by night: Have you seen New York by night.

Whenever you add a modifier of any kind, the preposition is on (if there is a preposition at all):
on a

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