Persian new year is called Norooz (can also be spelled Nowruz, Nawroz, Noroz), which marks the arrival of the spring. No means new and Rooz means day.
Norooz has been celebrated for thousands of years in Iran and Central Asian countries formerly belonging to the ancient Persian Empire. Today, Norooz is the world’s only event celebrated at exactly the same time all over the world. The celebration is not linked to religion and is based on the spring equinox, many claim the celebrations around Norooz and call it, for example, the Bahai New Year. But the Bahais originate in Iran and that is why they celebrate the Persian New Year – not because they are Bahais! We Iranians do not like to have the festivities linked to a religion. The Kurds also call it for the Kurdish New Year – even this is wrong – they celebrate Persian New Year because they have their roots in the old Persian Empire! Nothing else.