Sizdah Be-dar, also known as Nature Day, is observed in Iran every April 2. This ancient Persian festival, which dates back to the era of the mythological king Jamshid, celebrates family and friendship while honoring nature. Traditionally, it is believed that on this day, the demon of drought was defeated by the angel of rain, prompting celebrations that included the sacrifice of sheep and the cooking of kebabs. In contemporary Iran, people celebrate by picnicking in parks and gardens, enjoying food, singing, dancing, and engaging in various traditional activities. A notable custom at the end of the festivities involves throwing away Sabzeh, the green sprouts from the New Year's table, which are thought to have absorbed ill fate and sickness. Additionally, young unmarried girls knot blades of grass in hopes of marrying soon. The festival has roots in Zoroastrianism, where it is believed that the joyous celebration helps cleanse bad thoughts.