Show HN: A temporal engine for dual calendar synchronization (50k years)
A developer created a temporal engine that synchronizes dual calendars across 50,000 years, enabling cross-era date conversions and historical timeline alignment. The system supports multiple calendar systems for long-term temporal data management.
Background
- "Show HN" means the creator posted their own project on Hacker News, a tech forum, for feedback.
- A "temporal engine" is software that handles dates and time calculations across different calendar systems (e.g., Gregorian, Lunar, Hebrew, Chinese).
- "Dual calendar synchronization" means showing equivalent dates in two different calendar systems simultaneously, spanning up to 50,000 years — far beyond what standard tools support.
- Calendars are hard to align across long spans because they mix astronomy (moon phases, solstices) with human rules (leap-year conventions, political calendar reforms). Existing date libraries typically break down after a few thousand years.
- This matters for historians, astronomers, and developers who need to work with dates far outside the modern era.