ما هو أفضل وقت لصلاة التسابيح وقيام الليل لتجنب فواته؟

There is no harm in the Tasbih prayer, and it is permissible to perform it at any time, day or night, except during times of prohibition or dislike. It is not specific to the night of Friday or its day. The best time to perform the night vigil (Qiyam al-Layl) is during its last third.