गणितं मूर्धनि स्थितम्
— Mathematics is supreme among all sciences
Lilavati
Indian Calendar Infrastructure for Developers
Named after the 12th-century mathematical treatise by Bhaskaracharya. Lilavati transforms ancient Indian astronomical knowledge — preserved in Sanskrit texts like the Surya Siddhanta — into modern, precise, developer-friendly infrastructure.
The gap
Hindu festivals aren't fixed dates. They're computed from planetary positions. Diwali in New York falls on a different date than Diwali in Delhi. Ekadashi times depend on your latitude. The Panchang varies by regional tradition — Tamil, Telugu, Bengali panchangs compute differently.
Yet no clean, maintained, open-source solution exists for developers. Existing libraries are dead, license-restricted, or astronomically incorrect. Hundreds of FaithTech startups and thousands of Indian apps need this infrastructure. They end up hardcoding dates from lookup tables or paying for bloated astrology APIs.
Lilavati is the missing infrastructure layer.
Ancient precision, modern access
Indian astronomers computed planetary positions with extraordinary precision centuries before the telescope was invented. The Surya Siddhanta, Aryabhatiya, and other classical texts contain algorithms that modern science has validated and refined.
Lilavati builds on this tradition. We make Panchang computation — Tithi, Nakshatra, Yoga, Karana, Vara, festivals, and auspicious timings — accessible to any developer, for any location on Earth, for any date.
Whether you're building a temple app, a devotional reminder service, a wedding planning platform, or a regional calendar — Lilavati provides the computation layer so you can focus on your users.
Open core model
The core computation library is free and open source under the MIT license. We believe sacred calendar algorithms should be freely verifiable and usable by anyone. A hosted API will add convenience, scale, and premium features for teams that need them.
Open Source Library
Free forever — MIT licensed
Full Panchang computation, sunrise/sunset, festival dates, and auspicious timing windows. Install it, inspect the code, verify against classical sources, and build freely.
Hosted API
Coming soon
A managed REST API for teams that want zero infrastructure overhead. Auto-generated SDKs, webhooks, and premium features like Kundali computation.
Built for the FaithTech ecosystem
Any application that needs to know when a Hindu festival falls, what today's Panchang is, or whether this moment is auspicious.
Temple & Devotional Apps
Daily Panchang, festival calendars, puja timings, and Ekadashi reminders for devotional platforms.
Wedding & Event Platforms
Muhurat computation for auspicious dates, Kundali matching for matrimonial services, and regional calendar support.
Media & Content
Festival-aware content scheduling, regional calendar widgets, and daily horoscope infrastructure.
E-Commerce & Retail
Festival-based campaign timing, regional holiday calendars, and dynamic pricing triggers.
Health & Wellness
Ayurvedic daily routines (dinacharya) based on tithi and nakshatra. Yoga and meditation timing.
Community Platforms
Diaspora community apps, cultural centers, and non-profit organizations serving Hindu communities worldwide.
The calendar infrastructure India needs
Lilavati is open source and actively developed. Star the repo, explore the code, or get in touch for early API access.