Reply To: why “early to bed, early to rise” and not “late to bed, late to rise”?

The Kaf HaChaim writes that one hour of learning before dawn is equal to many hours of learning during the day (1,24). Nonetheless, the Rambam indicates that it is preferable to stay up late and learn during the night (Deos 4,4). Other authorities support this view and encourage going to sleep after midnight (Arugas HaBosem 1).

“It is better to sleep well at night than to cut back on sleep and be tired all day” (Taz, Even HaEzer 25,1).