"Inians have a tradition of spending the day outdoors on the 13th of
Farvardin. From very ancient times, people have enjoyed this day, although it
is also the day that marks the end of the Norouz celebrations.
The first 12 days of the year are very important, because they symbolize order
in the world and in the lives of people. The 13th day marks the beginning of
the return to ordinary daily life.
It is customary on this day, for families to pack a picnic and go to a park or
the countryside. It is believed that joy and laughter clean the mind from all
evil thoughts, and a picnic is usually a festive, happy event.
Sizdah-Bedar is also believed to be a special day to ask for rain. In ancient
Iran, every day had its own name, and belonged to a different angel. The 13th
of Farvardin belonged to the angel of rain. This angel is depicted as a
Sizdah-Bedar is also a day for competitive games. Games involving horses were
often chosen as a victory of a horse represented , the angle of rain.
Another tradition on the 13th, is the knotting of blades of grass by unmarried
girls in the hope of finding a husband. The knotting of the grass represents
the bondage of a man and a woman. These days, girls sing this song while
knotting: " Sizdah-Bedar sal-e deegar khooneh shoohar, bacheh baghal",
meaning: "Next Sizdah-Bedar, in my husband's home, holding a baby"!
(courtesy of ketabfarsi)