What if there was no day or night?

Answer 1

Studies have shown that humans, when subjected to an environment with no light(such as a cave) and have no way to tell time, will revert to a twenty-five hour day schedule. This would throw off the calendar as humans consistantly added an hour to their days.

However, if humans retained clocks and other timekeeping resources, time could be kept properly. Even if no clocks were available, as long as the moon and stars could be seen, time could be kept relatively well and the lunar calendar could be kept.(For example if we lived on a planet where one side was constantly facing away from the sun.)

Answer 2

Without the concept of day and night, life as we know it would drastically change. Our circadian rhythms, sleep patterns, and various ecological processes are all tied to the cycle of day and night. It would be difficult for organisms to adapt to a world without these fundamental rhythms.

Answer 3

There is no day or night in heaven, because it's eternity. But here, I think we have to have a day and night so we can rest ourselves