It most likely is. Studies of published authors find that their writing is either done around sunrise at 6AM; or otherwise in the middle of the night, around 1-3AM.
Mature creators fall into the morning producing group, while 'young geniuses' usually do their best work in the late-night hours.
Mature creators fall into the morning producing group, while 'young geniuses' usually do their best work in the late-night hours.