Hindu festival dates follow the lunar calendar (panchanga) system, which tracks five key elements: tithi (lunar day), vara (weekday), nakshatra (star constellation), yoga (auspicious period), and karana (half-lunar day).
The calculation system, documented in ancient texts like Surya Siddhanta, demonstrates sophisticated astronomical knowledge. Festival dates are determined by:
Modern astronomers have verified the accuracy of these ancient calculations. While dates may vary by region due to different calculation methods, the core astronomical principles remain consistent.
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