Canada

The 24 hour clock that zeros at midnight is entirely artificial. How can numbers we made up be bad for your health?

We're talking about offsetting human activity with sunrise and sunset, right? And we do this by changing the clocks everywhere in a time zone twice a year such that the rule "The business opens at 9 AM and closes at 5 PM" remains the same, but how far those events are from local solar noon sloshes back and forth a bit.

So, hold the clocks still, pick what times it is healthy for school to start and end, and then start and end school at those times. 8 to 3? 7 to 2? 9 to 4? Who gives a shit what the numbers actually are?

Moving the clocks back and forth gives everyone everywhere jet lag twice a year, which isn't good for anyone's health.