For you out of town "no tails", the Zibelemärite is described here :
Bern Info
basically a chance to get some Glühwein in early doors & beat up spotty kids on all the street corners.....
another excuse for the usually dour Bernese to throw off the inhibitions & get pissed early in the morning .... end result 50 tons of onions & garlic, ankle deep confetti & 24hr ribald fun.
for you folks that live in the second, third, fourth cities & beyond, if you want to come along, we will baby sit you.
P