And the perfect time to try it out is on the upcoming weekend, the European server hosts a 2 day event.
European maps
August, 11th @7pm CEST (= server time)
Rheinuebung - May 1941
Gela Operation Husky - July 1943
Ilomantsi - July 1944
Stashuv Area - August 1944
Bombing the Reich - 1945
Alpenfestung - May 1945
Pacific maps
August, 12th @7pm CEST (= server time)
Battle of Leyte Gulf - October 1944
Battle of Iwo Jima - March 1945
Operation Kikusui Day 1 - April 1945
Air Raid Alert - Kure - July 1945
Manchuria - August 1945
Naichi - November 1945
7pm CEST means +3 hours from the time of this posting.