Nowruz Holiday, Farvardin 4. This day is part of the Nowruz holiday period in the Shahanshahi calendar, coinciding with the start of the Persian new year. Nowruz is recognized as one of the oldest Iranian festivals, with origins dating back to ancient times. The celebration includes customs such as visiting relatives, spring cleaning, and setting the Haft-Seen table. During the Shahanshahi era, the Nowruz holiday held special significance, with the first days of Farvardin designated as public holidays to mark the new year. These days provided an opportunity for families to gather and observe national and cultural traditions, a practice that continues among Iranians and some neighboring communities.