Time & Date Tools

Debug epoch values, compare UTC and local time, or measure the exact elapsed span between two calendar dates.

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Convert Unix timestamps and ISO 8601 dates both ways.

Compare two dates with elapsed, inclusive, weekly, and calendar spans.

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Move between seconds, milliseconds, and ISO 8601 input that includes Z or an explicit offset.

See direction, elapsed and inclusive days, weeks, weekdays, and a clamped year-month-day span.

Local-first

Your timezone and date inputs remain on your device and no calendar account is required.

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