What does “No matter how long the night, the day is sure to come,” mean?

There is a day and night cycle so I would assume that no matter how long the night feels or what is going on the next day is always going to happen the sun will always come out for the next day

in november 1781, john hanson became the first president of the united states in congress assembled, under the articles of confederation. many people have argued that john hanson, and not george washington, was the first president of the united states, but this is not quite true.

explanation: