All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
There are some Prophetic narrations confirming the permissibility of visiting the grave. These narrations are general and they are not restricted to a specified period of time. Therefore, it is permissible for a person to visit the graves at any time he wishes; for more benefit, please refer to Fataawa 90758 and 85657.
Finally, it should be mentioned that it is not permissible for a person to supplicate to Allaah to forgive someone who died as a disbeliever (non-Muslim) as Allaah Says (what means): {it is not for the Prophet [] and those who have believed to ask forgiveness for the polytheists, even if they were relative, after it has become clear to them that they are companions of Hellfire.}[Quran 9:113]. For more benefit, please refer to Fatwa 90989.