Modified Julian Date

Modified Julian Date Observatory

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Modified Julian Date · MJD = JD − 2400000.5

Julian Date

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continuous day count from 4713 BC Jan 1 noon

Unix Epoch

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seconds since 1970-01-01T00:00:00Z

Swatch Internet Time

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1 beat = 1 min 26.4 s · meridian: BMT (UTC+1) · 1000 beats/day

ISO Calendar

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WEEK — DOY — REMAIN—

World Clocks

UTC — LOCAL — OFFSET — TAI−UTC +37s

Day Progress

ELAPSED — REMAIN — FRACTION—

year fraction: —

Solar Events 📍 acquiring location…

DAWN

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SUNRISE

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SOLAR NOON

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SUNSET

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DUSK

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DAYLIGHT

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SUN ALTITUDE

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SUN AZIMUTH

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Lunar

🌑

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—% illuminated

MOONRISE —

TRANSIT —

MOONSET —

ALTITUDE / AZIMUTH

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Other Timescales

DECIMAL — J2000 — GPS WEEK — GPS SEC — LILIAN — RATA DIE —