The Sechseläuten (Zürich German: Sächsilüüte, "The six o'clock ringing of the bells") is a traditional spring holiday in the Swiss city of Zürich celebrated in its current form, usually on the 3rd Monday of April, since the early 20th century. Burning of the Böögg Following the parade of the Zünfte (guilds), the climax of the holiday is the burning of Winter in effigy, in the form of the Böögg, a figure of a snowman prepared with explosives. The custom of burning a rag doll called Böögg predates the Sechseläuten. A Böögg (cognate to bogey) was originally a masked character doing mischief and frightening children during the carnival season. History The roots of the festival go back to medieval times when the first day of summer working hours was celebrated in the guildhalls across the city. City ordinances strictly regulated the length of the working day in that era. During the winter semester the workday in all workshops lasted as long as there was daylight, but during the summer semester (i.e. starting on Monday following vernal equinox) the law proclaimed that work must cease when the church bells tolled at six o'clock. Sechseläuten is a Swiss German word that literally translates into "The six o'clock ringing of the bells". Changing to summer working hours traditionally was a joyous occasion because it marked the beginning of the season where people had some non-working daylight hours. Burnings of Böögg figures (the Swiss German term for "bogey", in origin scary-looking ragdolls) in spring are attested in various places of the city from the late 18th and early 19th century, without direct connection to the Sechseläuten. The combination of the Sechseläuten parade and the burning of an official Böögg was introduced in 1902. From 1902 until 1951, the holiday used to be held on the first Monday following vernal equinox. On that day, the Fraumünster bell, for the first time in the year, tolled to mark the end of working hours at 6 p.m. (historically the time of sunset on vernal equinox). The holiday was moved to the third Monday of April in 1952. Because of the later date, and because of summer time introduced in 1981, the lighting of the Böögg'''s pyre at 6 p.m. has now moved to several hours before nightfall. Additionally, because of its present date, the holiday is often within a week of 1 May, leading to a stark contrast