Can You Do ‘Umrah on the Day of ‘Arafah?
Question

Is `umrah on the day of the standing in `Arafah makruh?
Praise be to Allah.“If a person is not doing Hajj and he does `umrah on the day of `Arafah or the day of `Eid , there is nothing wrong with this, because doing `umrah is permissible at all times and there is not a specific time for it, as there is in the case of Hajj. So whenever a person does it, it is a valid `umrah and we ask Allah to accept it from us and from him.” 
Majmoo‘ Fataawa Ibn ‘Uthaymeen (22/264)