If you mean the CT arena, I check it several times each evening to see if the victory conditions are met (at midnight EST is the last look of the day). If there are no Japanese bases left on their HQ island, I reset it. I don't want to keep people from having fun:D. I'd check it every couple of hours throughout the day, but for some strange reason my employer won't let me have AH on my computer at work. Some people, eh?
Sabre
CT Team