Charshanbe Suri is a prelude to Nowruz (the Iranian New Year) and is celebrated with firework displays and the jumping over of fires.
Jumping over fire
The celebration usually starts in the evening, with people making bonfires and jumping over them (purificatory practices found also in the Celtic festival of Beltane).
The traditional poetic quote zardi ye man az to, sorkhi ye to az man is also sung, which literally means “my yellow is yours, your red is mine.” This means you want the fire to take your pallor, sickness, and problems and replace them with warmth and energy. It is a purification rite, which is traditionally regarded necessary before the arrival of spring at the vernal equinox.