Soundcheck starts 3pm - half hour set from 5pm.
Entrance free but donations to Lichtblicke charity welcome.
Berliner Strasse and Strengerstrasse around the area will be sealed off during the concert.
The Royal Military Police have announced a BFG-wide reprieve from prosecution
for the surrender of illegal weapons during the amnesty period, which runs from March 1 to 31.
The crime prevention (CP) initiative is being led by 110 Provost Company, with drop-off points at local police stations in Sennelager, Hohne, Gütersloh and Herford for all theatre-based personnel who are subject to the Service Discipline Acts.
Previous weapons amnesties have been successful, with dozens of weapons being handed in which were then safely destroyed.
Lt Jodie Thomas, Ops Oficer, 110 Pro Coy 1 RMP, said: “With the ongoing drawdown of BFG this planned event is designed to highlight the potential repercussions of possessing offensive weapons, whether knowingly or otherwise.”