What you are saying is an old theory. The world has changed. There was a time when there was only a day to work and night to rest. Now it is entirely different. We work day and night. The world works in shifts. Day and night shifts, eight hourly shift, or six hourly shift. Therefore, the time to sleep and rest differs. Also, the age that matters. The olds don't get sleep easily. They sleep during the day and keep awake during the night. They go to bed only after midnight. Not only the olds, but also the youngsters.
Remember, the member posting after midnight must have slept well during the day. They keep ISC busy 24x7.
No life without Sun
Knowledge is power.
Why I gave this example is to make a point that the timing of the action will depend on the working needs. We should be flexible and see that we utilise the time effectively and to get the maximum benefit.