100% private. All date math runs in your browser — nothing is uploaded, stored, or sent anywhere.
Date / Time
Duration between two dates
Pick a start and end date to see the exact calendar duration and totals.
Duration
Calendar breakdown
- Years
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- Months
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- Days
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Totals
- Total days
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- Total weeks
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- Total hours
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Questions people ask
How are years and months calculated?
Years and months use calendar math (same day-of-month), so results follow the real calendar including leap years. Total days is exact.
Does daylight saving time affect results?
Yes — dates are handled in your local timezone at midnight, so daylight-saving transitions do not skew day counts.
Are my dates sent anywhere?
No. All calculations run locally in your browser. Nothing is sent or stored.