Just something that popped in my head, and was curious if there was a simple way of making a mechanism to do that.
Something like,
“from 0600 to 1200, use Vanilla”,
“from 1200 to 1800, use Solar Flare”
“from 1800 to 0000, use Cupertino Dark”
“from 0000 to 0600, use Gruvbox Dark”
or even a different selection, if someone only wanted to use Vanilla and Cupertino Dark, or their own custom palettes.