[Asooka]

I'm only aware of Russia switching to permanent summer time in recent memory and they switched back to permanent winter time two years later because the long dark winter mornings were unbearable. Also, your circadian rhythm doesn't care for where the hand on the clock is and doesn't like being pushed too far outside of where you naturally would have it.

It would be best to keep the clock as close to astronomical time as the timezone system allows and adjust certain business times if required to be off the standard 9-to-5. Which already happens.