DATES

The same instant in time, expressed in every calendar humanity still uses. Julian Day Number (JDN) is the absolute day count shared by every system.

JDN

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Six Primary Calendars

Gregorian

Solar

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Julian

Solar

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Hebrew (Jewish)

Lunisolar

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Islamic (Hijri)

Lunar

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Indian National (Saka)

Lunisolar / Solar reform

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Chinese

Lunisolar

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Other Calendars in Use

Persian (Solar Hijri)

Solar

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Buddhist

Solar

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Ethiopian

Solar

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Coptic

Solar

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Maya Long Count

Astronomical count

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ISO 8601 Week

Solar (week-numbered)

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Source

More calendars (Bahá'í, Igbo, Yoruba, traditional Korean, Vikram Samvat, Tibetan, etc.) will be added as the canonical conversion tables are folded in. The dashboard will surface a curated subset.