salam as u know Nowruz which means "New Day" is the traditional celebration of the ancient Iranian New Year. It s the 1st day of spring which usually occurs on March 21 or the previous/following day depending on where it is observed. As well as being a Zoroastrian holiday and having significance amongst the Zoroastrian ancestors of modern Iranians, the same time is celebrated in the Indian sub-continent as the new year. Ancient Iran had 27 feast. Nowadays from those feast they have only Yalda, Suri (= charshanbe suri) & Nowruz. Even after Islam this feast remained the most famous among those others. Iranian had 360 days in their calender and each month 30 days, so the remaining 5 days called robbed days or according to farsi Panje. The feast of nowruz used to start one night before these 5 days which was Suri (after Islam, people call it charshanbe Suri). hope it helps you. :)

I do. :)