https://oshofriends.com/dictionary/68961Night
The night is the time of the mystic, the day is the time of the warrior. The night represents a change in the whole atmosphere. It is easier to meditate in the night than in the day. Meditation is far closer to sleep than to any other activity, with only one difference: in sleep you fall unconscious, in meditation you remain conscious, but with the same relaxation. In the day it is difficult to sleep; if you want to sleep in the day you have to close the doors and the windows and pull all the curtains so it becomes dark. If sunrays are coming they won't allow you to sleep; sunrays activate your energies. Night helps you to rest and relax. It is the time of the mystic.
Sannyasins should use the time of night more and more for meditation. You can go deeper, and easily, because the winds are blowing that way; you can move with the winds with less effort. In the day you are moving against the winds. In the day active meditations are good; dynamic meditation is good in the day, dancing meditation is good in the day. But in the night vipassana, silent meditations, just sitting and doing nothing, just relaxing because the whole atmosphere is relaxing.... The sun has gone down, the trees have fallen asleep; it is a totally different quality of energy that surrounds you in the night. It is easy to meditate. [....]
The buddha, the awakened, the enlightened one shines both in the night and in the day; there is no difference for him. Once you have become awakened, then nothing makes any difference. But till that happens use the night atmosphere more and more for meditation.
And when the moon is there in the night it is far easier to meditate. The full-moon night is the best for meditation. Many people who have become buddhas have attained their enlightenment on the full-moon night, even Buddha himself. It may have been a coincidence, but it is significant to remember: he was born on the full-moon night, he became enlightened on the full-moon night and he died on the full-moon night. Something in the full moon seemed to be synchronizing with his energy.
-Osho, "The Dhammapada: The Way of the Buddha, Vol 11, #7"
