Why not be on Standard Time forever? That’s the normal time. With DLST kids will be going to school in Dec. and Jan. in the dark.
The use of DST is due to the annual variation in daylight hours. And you can blame that on the 23.5° tilt of the Earth’s axis relative to its orbital plane.
DST simply shifts an hour's worth of increased daylight during the summer from the morning to the evening, when people spend more time outdoors. In the fall, with shorter daylight hours, DST is shifted back until next spring.
Close to the equator or closer to the pole, DST isn't that useful.
It amazes me that nobody ever though of just changing the hours of operation.