An open world field is walked at noon and at midnight, and the player should know it is the same field. So this score writes twelve places twice. Both halves of a pair share a tonic and the same melodic cell. At night the mode darkens, the tempo drops, and the tune moves lower to a softer instrument.

A check reads the shipped MIDI and confirms that for all 12 pairs.
Also in it: title and overworld themes, six weather tracks, camp, map and daybreak themes, and 9 short cues. 53 minutes. OGG with loop tags for RPG Maker MV and MZ, plus every editable .mid. No battle or town tracks. $14.99.
https://csaf.itch.io/the-turning-sky
Disclosure: the composition code is AI written. No generative audio model is used.