What time is 4:30? 

Solution:

If we don't mention AM or PM, it is universally accepted that the time is mentioned according to the 24 hr clock format or the military time.

4:30  in the 24 hr clock format is the same time in the 12 hr clock format. We need not identify it is AM or PM.

4:30 is less than 12:00 and hence it is AM.

Thus, 4:30 in the military clock is also 4:30 AM in the 12 hr clock format

What time is 4:30?

Summary:

4:30 in the military clock is also 4:30 in the 12 hr clock format.