UUID Timestamp Decoder
Decode RFC-variant UUID v1, v6 and v7 timestamp fields. Identify other versions without inventing a creation date.
Starts with an editable example. Replace the dates and rules with your own.
Your calculation
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Select your counting rules and calculate.
Calculation details
| Step | Value |
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How to use this calculator
Paste canonical hyphenated UUIDs and choose a local display zone. Each row reports its version and available time precision.
V1 and v6 use 100-nanosecond units from the Gregorian 1582 epoch; v7 uses Unix milliseconds. The embedded timestamp can be supplied or altered and does not prove database insertion time.
A worked example
UUID C232AB00-9414-11EC-B3C8-9F6BDECED846 contains February 22, 2022 at 19:22:22 UTC.
Can a UUID v4 reveal when it was created?
No standardized timestamp is available in v4. It is identified without returning a guessed date.
Which calendar and years are supported?
Each result states its calendar, time scale, precision and supported range. Batch converters accept up to 100 nonempty input lines and retain invalid rows. Copy, CSV and print include the calculation rules. Calendar downloads appear when a result contains dated events. Calculations run in your browser; no reminders or jobs are scheduled.
What happens to my dates?
Calculations run on your device. Saving a calculation is optional and keeps it in this browser. A setup link contains the dates and settings you entered; anyone with the link can read them. Use one tab per saved calculator. Clear saved data from Privacy & settings.