By Elena Grothe
What a way to predict summer weather. According to Reuters: As the bells of St. Peter's church chime six o'clock, the bonfire below the Boeoegg, a snowman made of wadding and filled with firecrackers, is set alight and mounted guildsmen gallop around the pyre to the tune of the Sechselaeuten March. The faster the head of the Boeoegg, the symbol of winter, catches fire and explodes, the warmer and more beautiful the summer will be. Read more about the exploding snowman here.

Arnd Wiegmann / Reuters
The Boeoegg snowman explodes atop a bonfire in the Sechselaeuten square in Zurich on Monday, April 11.

Arnd Wiegmann / Reuters
The Boeoegg, a snowman made of wadding and filled with firecrackers, explodes atop a bonfire in the Sechselaeuten square in Zurich on Monday.

Alessandro Della Bella / EPA
A guild rides around the 'Boeoegg' on the Sechselaeuten meadow in Zurich, Switzerland, on Monday.