Old colloquial southern saying "Mad today, glad tomorow", means just what it says for instance if a neighbor, friend, family member with whom you are on decently close terms may come to misunderstanding over a slight or mishap perceived by one or the other and suffer hurt or
injurious feelings to their pride, ego, etc. He/she would or will soon get over that and move on to resume their relationship (with hopefully, a better understanding of each other) again...therefore, mad today, glad tomorow! Not mad at nobody!
Just sayin', sometimes a thing, matter/issue has to be
put in check by making someone think about their actions that may have brought on the discord. Be Happy, Worry!
Example:
Miss
Evie expressed her regret emotionally and out loud to the group of ladies who had forgotten to bring the cold
salads for the spring tea buffet to which her
sister Margaret who headed the sunshine committee, replied...mad today, glad tomorrow!