How does my world modify time with instructions?

1. Weather command /weatherclear can clear up the weather and turn it into a sunny day, which has no special effect and is the most common weather. Zombies, skeletons and other monsters will be burned during the day on sunny days.

2. Weather instruction /weatherrain, you can set the weather as rainy, which will have obvious rain effect and the brightness of the weather will be slightly reduced. On rainy days, zombies, skeletons and other monsters will not be burned to death during the day.

3. Weather instruction /weatherthunder, you can set the weather as a thunderstorm day, which has obvious rain and lightning effect, and the weather brightness is obviously reduced. Villagers will become witches when they are struck by lightning, and coolies will become high-pressure coolies when they are struck by lightning.