Can Demons be summoned only at night?
The first time you summon, ideally, should be done at night. Nighttime is usually quiet and more conducive to psychic workings. The right (psychic) side of the brain is by nature more active during the hours of darkness. Once you establish a relationship with a Demon, you can summon him/her telepathically at any time by concentration alone, unless the Demon feels otherwise. He/she will let you know. If the Demon is busy, which is often the case; he/she may acknowledge you at a later time, usually within a day.
