🪔 Hindu Festival Calendar

Most online Hindu calendars bake in a flat list of dates per year — easy to publish, but they drift when the underlying lunar-solar cycle does. AstroLumina computes every festival on the fly from the Swiss Ephemeris-backed panchang engine: the same engine that powers the daily panchang surfaces Tithi, Nakshatra, Yoga, Karana, sunrise/sunset, paksha, and sidereal sankranti for any city. That's how Diwali sits on a different Gregorian date each year while always landing on Kartika Krishna Amavasya — the engine tracks the moon and sun, and the rule fires on the right night.

Pan-India festivals (Diwali, Holi, Krishna Janmashtami, Maha Shivaratri, Raksha Bandhan, Vijayadashami, Akshaya Tritiya, Ganesh Chaturthi) appear in every regional view. On top, you can layer a regional pack: Karva Chauth and Lohri for North India; Pongal, Thaipusam and Vishu for Tamil Nadu; Pohela Boishakh and Durga Puja for Bengal; Gudi Padwa and Ganeshotsav peak days for Maharashtra; Navratri-emphasised days for Gujarat; Onam for Kerala. The same panchang also surfaces every Ekadashi, Pradosh Vrat, Sankashti Chaturthi, Vinayaka Chaturthi, Purnima and Amavasya in the chosen month.

South India and Maharashtra use the amanta convention (lunar month ends at the new moon). North India uses purnimanta (lunar month ends at the full moon). The same calendar day can sit in different lunar months under each — Diwali is 'Kartika Krishna Amavasya' in the north and 'Ashwin Krishna Amavasya' in the south, but it's the same night. AstroLumina names festivals using their published convention; the underlying astronomical date is identical across regions.

Tap 'Add to Google Calendar' to open Google's subscribe-by-URL dialog with the festival feed pre-filled. Or 'Download .ics' for a one-time import that works in Apple Calendar, Outlook, Fantastical and any iCal client. Subscriptions refresh on the calendar app's normal sync cadence (typically every few hours), so future-year dates and any improvements to the engine flow into your calendar without you doing anything.