on Monday morning or in Monday morning?


"On Monday morning" sounds wrong for me. But I heard some native speakers say it both ways.

I am confused.

asked Mar 25 '11 at 08:48 Hofi New member

2 answers


"On" is correct. Whoever is saying "in" is wrong, native speaker or not.


Rules for "on" and "in":


"On" precedes a day of the week.

"In" precedes a month, year or other period of time (eg. in a minute, in a heartbeat).

link answered Mar 25 '11 at 23:33 Collane Ramsey Expert

Thank you for your answer and explanation! HofiMar 26 '11 at 02:34

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But In is more correct than On, simply because  in this example 'Monday morning'


the head of the noun phrase is Morning and the noun monday serves as a premodifier or  functions as an adjective. So 'In the morning' is correct.

link answered Apr 05 '14 at 22:54 khaoula ksiouar New member

We're talking about on Monday morning not " in the morning ", so on is correct not in

Michael PinedaAug 31 '15 at 21:01

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