Find the difference between two dates, add or subtract time, and count workdays.
Live Unix timestamp with bidirectional conversion, multi-timezone and multi-format output
Open →Calculate exact age from a date of birth, with a countdown to the next birthday.
Open →Compare local times across time zones with automatic DST handling, handy for scheduling meetings across regions.
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Date Calculator offers three modes — date difference, add/subtract, and workdays — all using timezone-safe calendar arithmetic, so results never shift because of the user’s timezone or a DST transition.
They describe the same span two different ways: "total days" is an absolute day count (optionally +1 to include the end date), while the calendar breakdown is a walk like "1 year, 4 months, 12 days". Both are shown separately and clearly labeled so they are never confused.
No. All date math uses timezone-safe calendar arithmetic (pure calendar math anchored to UTC internally), which is never affected by the user's timezone or a DST transition — calendar-day results stay consistent.
The current version (v1) only excludes Saturdays and Sundays — public holidays are not included, and the UI clearly discloses this.
