Viareggio Carnival is considered one of the finest in Europe. The floats, the largest with moving parts in the world,  parade along the sea front.
viareggio.ilcarnevale.com

The Agrifiera is one of the most important agricultural fairs in Tuscan. It takes place at the end of April.
facebook.com/agrifiera

Giugno Pisano is a whole month of historical re-enactments and processions, concerts, open air music, cultural events all celebrating the antique traditions of Pisa.
giugnopisano.com

From May to September there are scores of country fairs where you can taste genuine Tuscan foods.
sagretoscane.com

The Lucca Summer Festival  –  top name pop concerts which have been running since July  1998. The open air concerts take place in Piazza Napoleone, Piazza San Martino and Piazza dell’Anfiteatro.
summer-festival.com

Effetto Venezia is the biggest event in the Livorno calendar. Music, street food, craft stalls, boat trips all in the traditional area of town called Quartiere Venezia. It takes place end of July/beginning of August.
effettovenezia.com

The Puccini Festival in July and August has world class opera performances on the shores of Lake Massaciuccoli.
puccinifestival.it

Internet Festival in Pisa in October. A top event  where technological innovators meet.
internetfestival.it

Lucca Comics & Games. An incredible event for lovers of comic strips, cartoons,  role games, illustration and cosplay. Takes place October 30th to November 2nd.
luccacomicsandgames.com