Counting days between dates by hand means tracking 28, 29, 30 and 31-day months plus leap years. Enter two dates and this calculator returns their absolute difference in calendar days. It does not break the result into weeks, months or years, and it does not exclude weekends or public holidays. Use it for a quick notice-period estimate, trip planning, warranty windows or an event countdown. Check the relevant contract or authority if a deadline depends on inclusive counting, business days or a particular time zone.
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