Technically, the equinox occurs when the sun comes in alignment with the equator. Tourists visited the Temple of the Moon and the Temple of the Sun outside of Mexico City to welcome the start of spring.
The main festival is on Friday this year but celebrations begin a week early in the town of Vrindavan, India - the birthplace of god Krishna.
Millions celebrate Nowruz, a festival that marks the beginning of spring and the new year for people from the Balkans to Central and South Asia.
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