Generates random dates uniformly distributed within a date range you specify. Useful for test data, mock databases, or any scenario where you need realistic-looking date values. Runs entirely in your browser.
Set a start and end date, choose how many you need, and the page samples uniformly random milliseconds between the two — then formats them as ISO 8601 (UTC, with the trailing Z), as a locale string in your browser's region, or as a plain Unix timestamp in seconds. Endpoints are inclusive.
Random dates are useful for seeding test fixtures, load-testing date-aware indexes, generating realistic mock data, or stress-testing a calendar UI with edge years. Because the underlying picker is millisecond-resolution, you also get a meaningful time component in every output — strip it if you only need a calendar date.
Yes. The tool picks a random integer of milliseconds between the two epochs and converts back to a Date, so every millisecond in the range has equal probability. There is no weighting toward weekdays, business hours, or any other subset.
Yes — the random pick is to-the-millisecond, so every output has a meaningful HH:MM:SS.sss component. If you only want dates (no time), strip the time portion after generating.
ISO 8601 outputs include the "Z" suffix and are in UTC. Locale strings use the visitor's browser locale and time zone. Unix timestamps are in seconds since 1970-01-01 UTC, which is timezone-independent by definition.
Yes. The Date object handles negative epoch values, so any year from roughly −271,000 to +275,000 is valid. ISO 8601 outputs for very-far-past or future years use the extended-year notation browsers implement.
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