How is night prayer offered ?

Answer:

Night prayer is offering voluntary prayer after Maghrib and before Fajr(dawn). As for Tahajjud, it is offering voluntary prayer at night after waking up voluntarily, and for Allah`s sake as He says: “And pray in the small watches of the morning: (it would be) an additional prayer (or spiritual profit) for thee: soon will thy Lord raise thee to a Station of Praise and Glory!”{Al-Isra`/ 79}. Offering Tahajjud is better than offering voluntary prayer before going to bed.