One of my sisters and my brother both say have a Blessed day, neither have been in prison or recovering alcoholics. Just to add to your hypothesis.
Ya, how many years ago did you start using it and I see youre from the south. ThankQ. My developing theory appreciates your input. :)
I hear it from middle aged to elderly black women sometimes, like in a store. I always like it, find it calming, because then I know she’s not angry at me on account of my skin color.
I think the region involved plays a huge part in such phrases’ usage.