Is the study of criminal jurisprudence and the sciences of Sharia at an Islamic institute considered an understanding of the religion, and is staying up late to study these subjects an act of worship?

Studying the jurisprudence of acts of worship and crimes, and other Sharia sciences such as Tafsir (exegesis of the Qur’an) and Hadith, is considered seeking understanding in the religion. Staying up late to study these is staying up late for a great act of worship.