Choose Your Plan
Unlock the full power of EternalClock with precision new crescent data spanning over 1,100 years.
Silver (Argent)
Monthly flexibility
Billed monthly, cancel anytime
- New crescent dates ±1 year
- iCal export for current year
Gold (Or)
Annual commitment, best savings
$7/mo equiv.
Save 42%
Billed annually
- New crescent dates ±2 years
- iCal export for current year
Diamond (Diamant)
Founding Patron — Limited Edition
EternalClock is the first chapter of an unprecedented horological project: a luxury timepiece by Roddy Carlo & Co. that integrates the new crescents of Jerusalem — a first in the history of watchmaking. As a Founding Patron, you are not simply subscribing to a service: you are investing in a vision that bridges millennia of astronomical observation with the art of fine watchmaking.
Each Founding Patron receives a unique serial number and priority access to the future timepiece. Your patronage directly funds the research and development of what will become the world's first watch to display the new crescent as observed from Jerusalem, calculated with NASA/JPL DE440 ephemeris precision.
Roddy Carlo & Co.
one-time
One-time payment, lifetime access — no recurring fees
- ALL years (1550–2650) — 1,100 years of data
- iCal export for any year with 24h reminders
- Founding Patron serial number (FP-001, FP-002…)
- Priority access to the future Roddy Carlo & Co. luxury timepiece
- Lifetime updates and new features at no extra cost
Each Founding Patron receives a unique serial number (FP-001, FP-002…) registered in our archives
eternalclock.com — Roddy Carlo & Co.
Technical Specifications
Algorithm based on multiple data analysis and comparison using NASA JPL DE440 Ephemeris for reference location: Jerusalem (31.7683°N, 35.2137°E, 754m)