Nowruz, also known as the Persian New Year, is an ancient Zoroastrian festival celebrated in Iran and other countries with Persian influence. The festivities begin on the last Tuesday of the previous year and continue for 13 days, marking the beginning of spring and a time to cleanse and renew. Traditions include spring cleaning, decorating with flowers, visiting family and friends, and sharing traditional food and sweets. One of the most significant Nowruz events takes place in Tehran, and it includes music, dance, and various cultural performances.