We lucked into this the last time we were in Florence and had a TON of fun sampling the amazing recipes of gelato artisans! Num, num, nummy, OMG....
It starts in Florence tomorrow and moves to Roma, Torino and Milano after that:
Firenze (Piazzale Michelangelo, 21 - 25 Aprile)
Roma (Terrazza del Pincio, 29 Aprile โ 1 Maggio)
Torino (Piazza Solferino, 25 โ 28 Maggio)
Milano (Piazza Castello, 1 - 4 Giugno)
Buy the ticket/bracelet either in advance or when you get there. More info:
http://www.gelatofestival.it/en
Some of the text is in Italian only but just copy/paste it into google or bing translate to get the gist. Like I said, we just stumbled into the thing and didn't have trouble figuring out how it worked.