Iran has a rich calendar of both Persian and Islamic festivals. The Persian celebrations predate Islam by millennia and are observed with great enthusiasm despite (and sometimes because of) their secular character.
Nowruz — Persian New Year (around March 20–21) is the most important event in the Iranian calendar, celebrated for at least 3,000 years. It marks the spring equinox and the start of the new year in the Persian solar calendar. The preparations begin weeks in advance: families set the Haft Seen table — seven symbolic items beginning with the letter S in Farsi, representing spring, health, and abundance. On the day itself, Iranians visit family, exchange gifts, and wear new clothes. The holiday continues for thirteen days, ending with Sizdah Bedar, when families picnic outdoors and cast green sprouts into running water to let go of bad luck. Traveling over Nowruz means booking everything in advance and sharing the road with what feels like the entire country.
Chaharshanbe Suri (Fire Festival) falls on the eve of the last Wednesday before Nowruz. People light bonfires in the streets and jump over them, calling out for the fire to take their ailments and leave them glowing health. It is exuberant and occasionally chaotic — a rare public festival with fire in the streets.
Yalda Night (Shab-e Yalda) is the celebration of the winter solstice, the longest night of the year (around December 21). Families gather to stay up through the night together, reading poetry (especially Hafez), eating pomegranates and watermelon, and telling stories. It is intimate and atmospheric — the kind of festival that makes you glad to be a guest in someone's home.
Ashura and Tasua fall in the first ten days of the Islamic month of Muharram and commemorate the martyrdom of Imam Hussein at Karbala in 680 CE. The observances are among the most intense in the Shia world: processions, lamentation, and Ta'ziyeh (passion plays re-enacting the events of Karbala) take place in cities and villages across Iran. Non-Muslims are generally welcome to observe from the sidelines. The atmosphere is deeply felt and unlike anything else in the region.
Mehregan is an ancient harvest festival in mid-October, dedicated to the Zoroastrian concept of Mithra (friendship and the sun). It is more muted than Nowruz but celebrated in Zoroastrian communities and increasingly reclaimed as part of Persian cultural heritage.
Eid al-Fitr and Eid al-Adha follow the Islamic lunar calendar. Eid al-Fitr marks the end of Ramadan with three days of celebration, family visits, and charitable giving. Eid al-Adha, two months later, involves animal sacrifice and communal feasting. Both are public holidays when businesses close and transport becomes busy.