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➕➖ Date Math

Add or subtract years, months, days, hours, and minutes from a date. Quick online date calculator.

Date Math Calculator

Add or subtract years, months, days, hours, or minutes to a base date. Useful for deadlines, scheduling, or quick date calculations.

Base date/time (local)

Years

Months

Days

Hours

Minutes

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Convert Unix timestamps to human-readable dates and back. Supports ISO 8601 and local time conversion.

Calculate the difference between two dates in days, weeks, or months. Fast and accurate date difference tool.

Create a countdown to any date or time. Useful for events, launches, deadlines, or personal reminders.

Start, pause, and reset a precise stopwatch for tasks, workouts, and speed-runs.

Enter a date and see how many days are left (or days since). Simple and fast.

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