Yes. And it is active at sunset.
It is not the hour on our watch that count. It's a biological natural cycle. We sleep at night.
Knowing that, there are differences between humans. Some tend to be active at the end of the day and to sleep late in the morning, others tend to be active staight out of the bed early in the morning and to fall asleep early in the evening.
Kids should (shall?) fall asleep early, so parents can sleep enough to take good care of them 🙃
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