[Wagamama]

Hey people wassup its me again=)
So anyways going straight to the point...i have planned my itinerary for my trip which is supposed to be happening on the early december to mid december but the way i see it,everything we are doing (shrines & temples visiting,Cycling,sighting seeing,garden viewing etc) it lacks a certain something.....festivals!also i have big concern whether there will be much of a scenery in december when winter hits
so i was wondering whether switching the trip to May(early summer,when to my knowledge is the period where alot of major festivals are happening) would be a better idea?i feel everything we can achieve in december can be done in may.
Do help out thanks=)

oh yes please do give suggestions when the most happening/fun festivals occur in japan
Cheers( crap i spelled dilemmas wrongly pardon me lol)