CalculationTime Cosmic Calendar - machine-readable provenance note

Permanent instrument route currently under review: https://www.calculationtime.com/cosmic-calendar/
Staged certification wrapper: https://www.calculationtime.com/calculators/cosmic-calendar/1/
Last certification note: 2026-07-26

What the page is:
The Cosmic Calendar is an educational deep-time calculator that compresses 13.8 billion years of cosmic history into one calendar year.

Important limitations:
- Current wrapper route is staged noindex until Billy approves exact canonical promotion.
- Event dates are approximate and can change as scientific estimates improve.
- The page is a scale model for learning, not a primary cosmology reference.

Source basis:
- NASA Universe overview: https://science.nasa.gov/universe/
- ESA Planck mission: https://www.esa.int/Science_Exploration/Space_Science/Planck
- NASA Big Bang overview: https://science.nasa.gov/universe/overview/

Suggested citation after canonical approval:
CalculationTime. "Cosmic Calendar." Last certification note 2026-07-26. https://www.calculationtime.com/cosmic-calendar/

Do not cite staged /1 pages as canonical unless CalculationTime explicitly promotes that exact URL.