changing the date to extend gameplay???

[Echo]

now that i have my xxi fully decked out the way i want it, its mid december 1944... i kinda went through alot of crap to get my crew properly trained for this boat and i now have very little time to use it before the war is over. ive set days in base to 1 so time will practicly stop between missions but the missions themselves tend to last a long long time. ive noticed that there is a start date and an end date in the sh3 patrols_0.cfg or something like that but i cant seem to alter the date in my career. anyone know of a way to shange the date to late december 1939 so i can ride out the war in my pretty new xxi? oh btw for the people who hate the deck gun, ive found a cure for those who cant seem to get enough of the thing. install that reload rate mod for 0.1 seconds and let em rip. i used to love the deck gun but now ive grown tired of the boomboomboomboomboomboom and am quite content playing with torpedoes. guess i just needed to get that crap outa my system. hellof a lot of fun tho watching all those splashes appear at once :D