So the idea popped into my head. In medieval times, armies basically knew the routine was fight at first light. They' get their breakfast, gear up and head onto the field of battle.
Also in another realm v realm game I played that had scheduled battles, Pirates of the Burning Sea, all fights were LIMITED to that server's prime-time.
After attackers have initiated an attack, Why not let attackers PROPOSE a time to schedule a fight. (must be between 24-48h after initiation~).
Defenders have the option to
Refuse
Accept
Counter with a different time.
I think this would make it alot more fun if 2 forces could pick an opportune time for a battle (prime time during weekdays or daytime during weekend) so that everyone is able to participate. Obviously this is completely voluntary on the part of the defenders.