Learning at day and night
From Halachipedia
- It’s important to learn at night and not waste it all with sleep, eating, and talking because one accomplishes most of his learning at night [1], that learning is not easily forgotten and is considered like the Avoda of the Korbanot. The joy of Torah is specifically felt for learning at night and Hashem grants a special Chesed for one who learns at night. [2].
- There's a special practice to "join the day and night" with learning or davening by learning during sunset and sunrise. [3]
- If one has a certain daily schedule of learning and hasn't completed it yet, one should finish it at night. However, preferably one should make a stipulation not to accept the daily schedule as a neder, but rather bli neder incase one misses a day. [4]