Chahārshanbe-Sūri is an ancient Persian festival dating at least to 1700 BCE of the early Zoroastrian era.The festival of fire is a prelude to the Norouz festival, which marks the arrival of spring and revival of nature.
Traditionally celebrated on the last Wednesday night of the year, Chahrshanbeh Soori has, since the Iranian revolution, been marked on the evening of the last Tuesday.
The word Chahar Shanbeh means Wednesday and Suri is red. Bonfires are lit to keep the sun alive till early hours of the morning. The celebration usually starts in the evening, with people making bonfires in the streets and jumping over them.