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Date Calculator

Date Calculator

Calculate days between dates, add time, track countdowns.

Date Duration Calculator

Quick presets

Enter two dates to see the gap

How to calculate days between dates

  1. Open Date Calculator

    Go to date-calculator.hanoon.app in your browser.

  2. Enter your dates

    Select a start date and an end date using the date pickers.

  3. Read the result

    The difference is shown instantly in days, weeks, months, and years.

How do I calculate the number of days between two dates?

Enter a start date and end date in the Duration tab. The calculator instantly shows the difference in years, months, weeks, and days.

Can I add or subtract days from a date?

Yes. Use the Add/Subtract tab to add or subtract years, months, weeks, or days from any date.

Is my data private?

Yes. The dates you enter are processed locally in this browser. They are not sent to or stored by the app backend.

How does the D-Day countdown work?

Enter a target date and optional event name. The countdown shows remaining days, hours, minutes, and seconds in real time.