A written year
2000 — already written.
That year was
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Days ago (about)
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Years ago
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Generations back
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Lifetimes back
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Full moons since (about)
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Zodiac cycles since
The world then
The internet is mostly dial-up. Google is two years old, the iPhone is seven years away, and the world holds about 6.1 billion people — roughly two billion fewer than today.