Time and Date Calculator
Calculate date differences, or add and subtract time
What is Time and Date Calculator?
A free calculator with three modes: find the exact difference between two dates or times, or add and subtract days, weeks, months, and years from a date. It correctly handles leap years, months of different lengths, and daylight saving time changes, including local times that don't exist or repeat during a clock change. Optional time zone support on each side. No sign-up, runs entirely in your browser.
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