The traditional Persian New Year gathering held on the thirteenth day after Nowruz is called Sizdah Bedar.
Sizdah Bedar is celebrated on the thirteenth day of the Persian calendar year. Families commonly leave their homes for parks, countryside areas, or other outdoor spaces, turning the day into a large picnic and social gathering.
The custom is associated with spending the final day of the Nowruz holiday outdoors. People may play games, prepare food, visit relatives, and take part in rituals involving the sabzeh that has been grown for the Haft-sin table.
The name literally refers to the thirteenth day and the idea of going outdoors. It is distinct from Chaharshanbe Suri, the fire-centered observance on the eve of the last Wednesday before Nowruz.