Teacher Discussion Forums

Do all these work?
1-1. Late IN the morning of Sept. 1, he went to an art exhibition.
1-2. Late ON the morning of Sept. 1, he went to an art exhibition.
2-1. IN the morning of Sept. 1, he went to an art exhibition.
2-2. ON the morning of Sept. 1, he went to an art exhibition.
Thank you.

Hmm, the two with "on" sound better to me.

Thank you very much, Lorikeet.