[citation needed] Irrespective of when the Triodion falls, the three-week period preceding the first Sunday of Lent, it is customary for the Carnival of Patras to start on the day of St. Anthony (17 January).
During a spectacular celebration with elements of surprise, as the programme is kept secret till the last moment, the start of the Patras Carnival is declared by the town's mayor from the first floor balcony of the Apollon theatre.
Several groups have offices and clubs for the duration of the carnival period and many organise parties and dances or public events on streets and in squares.
Night, bright lights, an overwhelming stream of people, colors and high spirits combine to create a spectacular scene.
The parade begins around noon on the Sunday before Clean Monday with numerous satirical floats constructed by the municipality followed by an endless stream of groups, each one with an individual theme around which their costumes are designed.
Despite the constant flow, due to the number of people participating which in recent years has reached between 35 and 40 thousand, the parade takes several hours to complete.