The custom of flour smudging has its roots in the Byzantine era and is joyfully revived every year in Galaxidi. From 1840 onward, this celebration became associated with Carnival and Clean Monday during the era of sailing navigation, taking the form of a flour war. Sailors, shortly before departing on their long journeys, as well as the locals, would all celebrate together with feasting and a festive spirit.

During the Triodion period, fires were lit in the neighborhoods and musicians played in the cafés until morning. The highlight was the flour smudging in the market of Galaxidi, where men at first, and later women as well, took part in the wild flour throwing. They would throw flour at one another, causing laughter and playful teasing. Visitors who wanted to avoid being covered in flour had to have smudges or crosses marked on their forehead with polish. Today, the custom remains alive and attracts thousands of visitors who enthusiastically take part in the flour smudging festivities every year.