Nowruz is celebrated from March 21 to 23. It acquired official status in the Achaemenid Empire as a religious holiday in Zoroastrianism. Despite the spread of Islam during Arab conquests, Nowruz persisted and continues to be celebrated today. However, it lost its religious essence and simply marks the day of the spring equinox.
Nowruz is currently celebrated as the official start of the new year according to the astronomical solar calendar in Iran and Afghanistan. As a public holiday, Nowruz is celebrated in Tajikistan, Uzbekistan, Turkmenistan, Azerbaijan, Georgia, Albania, Kyrgyzstan, Macedonia, Turkiye, and Kazakhstan. There is a folk wisdom that the more generous the holiday, the more prosperous the year will be.