How to say: "I will try to move it to an earlier time" or what is the opposite of "delay"

Solution 1:

How about "I would like to bring the meeting forward to...". This is based on an accepted antonym of delay "bring forward".

Solution 2:

Advance fits the bill all right:

[ trans. ] cause (an event) to occur at an earlier date than planned: I advanced the date of the meeting by several weeks.

Solution 3:

My few cents: In actual practice I would probably just say or write:

"Can we move our meeting on April 23rd on 7 p.m. up to 5 p.m.? I'm unable to make it at 7 p.m." or "Can we move our meeting on April 23rd from 7 p.m. to 5 p.m.?"

If this was a much higher boss (or one that required a lot of deference) I would write:

Would it be convenient for you to move/reschedule our meeting on April 23rd from 7 p.m. to 5 p.m.? I am unable to make a 7 p.m. appointment on that date.

To reschedule for an earlier time (or "moving the meeting up) brings up the possibility of changing the date as well as the time, in my mind.

Solution 4:

The best answer has got to be prepone

I would like to prepone the meeting

The meeting has been preponed

Solution 5:

I would prefer to have the meeting a little earlier.