<Ul> <Li> Nowruz also known as Persian New Year marks the first day of spring and the beginning of the year in Iranian calendar . It is celebrated on the day of the astronomical vernal equinox, which usually occurs on March 21 or the previous / following day depending on where it is observed . Nowruz has been celebrated for over 3,000 years by the related cultural continent . The holiday is also celebrated and observed by many parts of Central Asia, South Asia, Northwestern China, Crimea and some groups in the Balkans . As well as being a Zoroastrian holiday and having significance amongst the Zoroastrian ancestors of modern Iranians, the same time is celebrated in the Indian sub-continent as the new year . The moment the Sun crosses the celestial equator and equalizes night and day is calculated exactly every year and Iranian families gather together to observe the rituals . </Li> </Ul> <Li> Nowruz also known as Persian New Year marks the first day of spring and the beginning of the year in Iranian calendar . It is celebrated on the day of the astronomical vernal equinox, which usually occurs on March 21 or the previous / following day depending on where it is observed . Nowruz has been celebrated for over 3,000 years by the related cultural continent . The holiday is also celebrated and observed by many parts of Central Asia, South Asia, Northwestern China, Crimea and some groups in the Balkans . As well as being a Zoroastrian holiday and having significance amongst the Zoroastrian ancestors of modern Iranians, the same time is celebrated in the Indian sub-continent as the new year . The moment the Sun crosses the celestial equator and equalizes night and day is calculated exactly every year and Iranian families gather together to observe the rituals . </Li> <Table> <Tr> <Td_colspan="3"> Tishrei </Td> </Tr> <Tr> <Td_colspan="3"> 1⁄2 </Td> </Tr> <Tr> <Td> </Td> <Td> Mon </Td> <Td> </Td> </Tr> </Table> <Tr> <Td_colspan="3"> Tishrei </Td> </Tr>

Who created the julian calendar which established january 1 as the start of the new year