Maybe it is an age thing or a cultural thing but I have had several miss communications when clients use a general term for a time of day. In the recent weeks I had two clients ask to meet in the afternoon. I suggested 1:00pm or 2:00pm to both. Client A, actually wanted to meet at 11:00am and Client B wanted to meet at 6:00pm. I'm not complaining - just stating an observation.
The following definitions are from Merriam Webster
Parts of the Day
Morning 5 am to 12 pm (noon)
Early morning 5 to 8 am
Late morning 11 am to 12pm
Afternoon 12 pm to 5 pm
Early afternoon 1 to 3pm
Late afternoon 4 to 5pm
Evening 5 pm to 9 pm
Early evening 5 to 7 pm
Night 9 pm to 4 am