Date & Timestamp Tools

Timestamp conversion, day counting, age and Japanese era.

Unix timestamp ⇄ date

Timestamp (seconds or milliseconds)

From a date/time

Start

End

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Base date

Days (negative = before)

—

Date of birth

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Gregorian date

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Reiwa, Heisei, Showa, Taisho and Meiji. Era boundaries use the Gregorian calendar.

A timestamp is read as milliseconds when its value is roughly 1×10¹² or larger, otherwise as seconds.
Dates display in your device's time zone.
All calculations run in your browser and are not sent anywhere.