This is a simple pack that adds a colored indicator to clocks in the overworld to let you know when the villager workday is taking place. It has 5 stages from not workday to workday, with the first warning of the workday approaching/ending taking place 45 seconds before. This pack is designed to overlay over the vanilla clock item, so the vanilla sprites should still display as they would normally, just with the color indicator placed on top. I tested the pack and can confirm that the indicator sprites are tick accurate to the workday schedule.

I have not tested it in 1.21.5, but I am not aware of any changes made between these versions that would have broken this pack.