Precision Chronometry

The definitive library of digital epochs, cosmic time, and the history of measurement.

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Unix Epoch (Milliseconds)
Session Duration
0
Milliseconds since arrival
Holocene Epoch
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Approx. ms since end of last Ice Age
Local Time
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Universal Time (UTC)
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World Clocks

New York (EST)
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London (GMT)
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Tokyo (JST)
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Human History

Apollo 11 Landing
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Ms since Eagle landed
Fall of Rome
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Ms since 476 AD
Great Pyramid
---
Ms since ~2560 BCE

Deep Time & Tech

Mesozoic Era (K-Pg)
---
Ms since extinction event
Age of Earth
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Ms since formation
GPS Epoch (1980)
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Ms since Jan 6, 1980
Y2K38 Countdown
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Ms until 32-bit overflow

Planetary & Alternate

Mars Sol Date
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Coordinated Mars Time
Internet Time
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Swatch .beats (Biel Mean Time)

Solar System Rotations

Mercury Day
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Venus Day
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Jupiter Rotation
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Saturn Rotation
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Uranus Rotation
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Neptune Rotation
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Pluto Day
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Cultural Systems

Chinese Ke (Qing)
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Decimal: 100 Ke / Day

Sci-Fi & Pop Culture

Star Trek Stardate
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TNG Era (Base 2323)

Historical Calendars

Mayan Long Count
---
Baktun.Katun.Tun.Uinal.Kin
French Republican
---
Decimal Time (10h/100m/100s)

Future Milestones

Apophis Flyby
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Near-Earth Asteroid (2029)
Halley's Comet
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Next Perihelion (July 2061)
Chernobyl Safe
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Habitable again (~22,000 AD)
Sun Red Giant
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Stellar Evolution (~5B Years)

Core Curriculum

💻

Digital Foundations

Computing epochs, standards, and the Y2K38 challenge.

Engineering
🌌

Physics of Time

Relativity, atomic vibrations, and cosmic dilation.

Science

Chronometry

From ancient sundials to mechanical escapements.

History
⚖️

Society & Law

How time governs biology, economics, and legal rights.

Humanity
📅

Global Systems

Deep dives into the world's calendars and eras.

Culture
🚀

Future Horizons

Nuclear clocks and the heat death of the universe.

Speculative
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About the Epoch Clock

The Epoch Clock is an educational visualization tool designed to contextualize our digital existence within the vast scales of history and the cosmos. By translating human, geological, and astronomical eras into the precision of Unix milliseconds, we aim to provide a humbling and intellectually stimulating perspective on the flow of time.