UnifiedCalendar.org
One Timestamp. Seven Civilizations. Sync via Astrophysics.
4 followers
One Timestamp. Seven Civilizations. Sync via Astrophysics.
4 followers
The Unified Calendar Protocol (UCP) is an open-standard engine designed to solve the "Intercalation Drift" problem in global timekeeping. Most date converters use simple math that drifts over time. UCP uses pure geocentric astrophysics and a geocentric UTC lock to synchronize seven major world calendars to the exact same astronomical moment. Whether you are building international HR platforms, global fintech apps, or cultural research tools, UCP provides a single, unambiguous source of truth.
DecorAI.xyz
Hi Product Hunt! 👋
I'm the creator of Yuanyu. I built the Unified Calendar Protocol because I was frustrated by how difficult it is to accurately synchronize international teams across Hijri, Lunar, and Vedic calendars without 'time drift.'
Most people don't realize that a 'New Moon' in one culture might be calculated differently in another. We fixed that at the mathematical root by using pure geocentric angles.
I’ve open-sourced the core engine on NPM so any developer can add world-class cultural support to their apps in minutes. I’d love to hear your feedback on the 2026 Master Almanac grid!
Web: UnifiedCalendar.org
NPM Library: unified-calendar/core
Happy to answer any questions about the astrophysics or the protocol!