Simplify the following text for a Grade 8 native English-speaking person.
Original: The Battle of Uhud ( ' ) was fought on March 19 , 625 ( 3 Shawwal 3 AH in the Islamic calendar ) at the valley located in front of Mount Uhud , in what is now northwestern Arabia .
Simplified: The Battle of Uhud was fought on 23 March , 625 ( 3 Shawwal 3 AH in the Islamic calendar ) at Mount Uhud , in what is now north-western Arabia .