It is, indeed, a trial to maintain the virtue of humility when one can't help being right. - Judith Martin

Yes, indeed. “Good morning” is an opener, and “Good day” is a closer.

It was generally believed that what people needed to get along was love and communication skills. Even business colleagues were thought to work better if they spoke their minds and really got to know one another personally, from which affection would follow — only not too much affection, because that might be illegal.

However, if you accept the actual invitation, no other appointment — unless with a surgeon or an undertaker — can take precedence.