St Nicholas is celebrated on December 6th in much of Christianity. Associated with sailors and gift-giving, he is the origin of Santa Claus.
The Festa della Salute each year on November 21st is an important holiday in Venice. The event celebrates the end of the plague in 1631.
Venice is divided into six sestiere whose origin is as old as the city of Venice itself. As far as we know, they have always been there.
The Festa del Redentore has been celebrated in Venice since 1577, to mark the end of the disastrous plague epidemic of 1575-77.