Sizdah be dar (Outdoor thirteen)

In Persian tradition, sizdah be dar is the custom of leaving the house for public celebrations on the thirteenth (sizdah) day of the month of Farvardin (corresponding to April 2), the last day of the Norouz (Iranian New Year) period. This is the last phase of the New Year's celebrations which begins with the Fire Festival of Chaharshanbe Suri. In modern times people go to parks, have a picnic and throw their sabzeh (green shoots or sprouts) – the seeds they grow near the beginning of Norooz - into a river, symbolizing the cycle of life. Some girls also tie the sprouts of sabzeh on this day, symbolizing their wish for good fortune in life and love. Some people also pull practical jokes and tell white lies on this day, calling it the thirteenth lie (this is very similar to April Fools). People will also release goldfish into a pond or river.

I know - nothing to do with dancing - but you must admit ... its different!!