The Carnival of Basel (German: Basler Fasnacht) is the biggest carnival in Switzerland and takes place annually between February and March in Basel. It has been listed as one of the top fifty local festivities in Europe.
The Basler Fasnacht starts on the Monday after Ash Wednesday at precisely 4:00 am with the so-called Morgestraich (see below). The carnival lasts for exactly 72 hours and, therefore, ends on Thursday morning at 4:00 am. During this time the Fasnächtler (the participants) dominate the old town of central Basel, running free in the streets and restaurants. Basler Fasnacht is often referred to as die drey scheenschte Dääg ("the three most beautiful days").
Unlike the Carnival celebrations held in other cities on the Rhine (such as those in Cologne, Mainz and Düsseldorf), the Basel Carnival features a clear and well-maintained separation between participants and the spectators who line the streets.
The approximately 18,000 active Fasnächtler dress up in a wide variety of costumes, including a mask known as a Larve. Participants are fully concealed and must remain incognito while parading; it is considered inappropriate and a breach of protocol to identify oneself by removing the mask, other than during official breaks from the parade. Members of the various Cliques wear costumes that fit a specific theme, except during Morgestreich and on Fasnacht Tuesday. Costumes and masks commonly represent famous people including politicians, or even comic characters or animals. More traditional masks recall Napoleonic soldiers, harlequins (Harlekin) and the famous Waggis.
The parades taking place on Monday and Wednesday afternoon are called Cortège and follow two defined ring routes: the inner ring runs clockwise, and the outer ring runs counterclockwise. The two routes are sometimes referred to as the blue and the red route because of their colour representation on the route map. The Fasnächtler who participate in the parade generally toss confetti into the crowds, and hand out candy and other treats to the spectators.