Amirezza is correct! Here's a tip: If you're talking about a specific time something happened, we usually use an article: "I met AJS in the morning on Tuesday" "I'll be meeting my parents for dinner this evening" "My birthday party is this afternoon, I hope you can come"

It depends. We say "in THE morning, in THE evening, in THE afternoon". But for greetings, we just say "Good evening", "morning", "good afternoon".

well explained Thank you Ryan..

Thank you