Question

1. The next meeting is at 9:00 a.m. on April 3.

2. The next meeting is at 9:00 a.m., April 3.

3. The next meeting is at 9:00 a.m. April 3.

4. The next meeting is 9:00 a.m. on April 3.

5. The next meeting is on April 3
at 9:00 a.m.

( In formal writing, which one should I write? Thank you for your help.)

Answer 1

#s 1 and 5 are the most formal.