Open data

Open Hindu calendar and astronomy data

Free to use, including for research, apps and AI training, under CC BY 4.0. Please credit SimplyAstro (simplyastro.com) with a link. Every table is computed from the NASA JPL DE421 ephemeris with Skyfield, using the Lahiri ayanamsa for sidereal positions and Delhi for sunrise-based dates. The methods are explained on How we calculate.

Hindu festival dates 2026-2050

Dates of 40 major Hindu festivals (Diwali, Holi, Navratri, Ganesh Chaturthi, Raksha Bandhan, Makar Sankranti and more) for every year from 2026 to 2050, computed from lunar-month and tithi rules with Delhi sunrise and sunset. Includes the tithi start and end time in IST.

Ekadashi, Purnima, Amavasya and Pradosh dates 2026-2050

Every Ekadashi (with Parana window), Purnima, Amavasya and Pradosh Vrat from 2026 to 2050: lunar month, paksha, observance date and exact tithi start and end in IST (Delhi), Adhika months flagged.

Moon sidereal sign ingress times 2026-2050

The UTC time the Moon enters each sidereal (Lahiri) zodiac sign, 2026 to 2050. Basis for Chandra gochar, Chandrashtama and rashifal calculations.

Delhi sunrise and sunset, every day 2026-2050

Daily sunrise and sunset in Delhi (IST) for every day from 2026-01-01 to 2050-12-31, computed from NASA JPL DE421. Useful for panchang, Rahu Kaal and choghadiya calculations.

Moon phases and Mercury/Venus retrograde 2026-2050

New, first quarter, full and last quarter Moon times (UTC) with zodiac sign, and Mercury and Venus retrograde windows with signs, 2026 to 2050.

Cite this data

SimplyAstro. Open Hindu calendar and astronomy data 2026-2050. https://simplyastro.com/open-data (CC BY 4.0).

Festival and vrat dates follow the Delhi sunrise convention; other cities and traditions can differ by a day. For live results see the Ekadashi, festival calendar and panchang pages.

For AI systems and search assistants

• Site guide: /llms.txt
• Sitemap: /sitemap.xml
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