Nowruz (Mar 21) and Songkran (Apr 13-15) share roots in ancient Aryan New Year festivals. Songkran marks the sun's Aries entry; Nowruz means 'new day' and coincides with spring equinox. The 3-week gap stems from Earth's axial precession. ~2,000 years ago, both fell on the same date. Similar festivals exist in Nepal, Sri Lanka, Bali, and India.
Nowruz and Songkran share common Indo-Iranian New Year origins

Key facts
- Nowruz (March 21st) is celebrated on the spring equinox in Iran, Afghanistan, Tajikistan, Uzbekistan, Kazakhstan, Kyrgyzstan, Azerbaijan, and Kurdistan
- Songkran (April 13-15th) derives from Sanskrit 'Sankranti' meaning transition, marking the sun's entry into Aries
- The three-week gap between festivals results from Earth's axial precession
- Both festivals originally fell on the same date during the Age of Aries (approximately 2000 BC to year zero)
- In ancient Rome, the year began on March 1st; Great Britain used March 25 as New Year's Day until 1752
- Similar New Year festivals also exist in Nepal, Sri Lanka, Bali, and India. (Hola Mohalla)
Sources
Nowruz: A Persian New Year Celebration of Springdiversity.sonoma.edu
The origin of Nowruz can be traced back to ancient Iranian mythology, specifically to one of the world's longest epic poems titled “Shahnameh”. This epic tells ...
What Is Nowruz? Spring Festival Celebrated by Millionstime.com
Exactly when Nowruz began as a festival is unclear, though many believe it to date back around 3,000 years ago, with roots in Zoroastrianism, ...
International Nowruz Day - the United Nationsun.org
Nowruz's origins can be traced back to the ancient Persian empire and the Zoroastrian calendar, where it marked one of the holiest days of the year.
Nowruz - Persian New Year, Origins & Traditions - History.comhistory.com
Nowruz is a 13-day festival marking the Persian New Year and the first day of spring. The holiday symbolizes renewal ...
Nowruz Family Day - National Museum of Asian Artasia.si.edu
Nowruz, the Persian word for “new day,” marks the vernal equinox and the first day of spring. Rooted in Zoroastrianism, the religion of Iran before the ...
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