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narivalaya yantra

Narivalaya Yantra

21st March and 22nd Sept are days when sun reaches an equinox, 21st march to 23rd of sept. the position of Sun is in northern hemisphere and 23rd of sept. to 21st March, the sun is in southern hemispehere. The position of sun is calculated by Narivalya Yantra. The IST can also be calculated by this yantra.