[95aqua-ta]

Actually the BoB lasted between July 10 to October 31 so around 4 months. If you go by the luftwaffe version of events, then you do get a longer time-frame

Actually according to many books on the Battle of Britain it is clear there was no real start date, since the first aircraft shot down was a bomber in the Forth of Firth in about April time ( sorry I don't have the book readily available at the moment ), and then there were still raids going into November although smaller scale nuisance raids.
Even the BoB day of 15th September is merely just a day of particulary heavy fighting, it neither symbolises the beginning or end of the battle. :-?