calendar utility

Date Duration Calculator

Compare two UTC calendar dates, switch inclusive counting on or off, and copy a clean duration summary.

waiting for dates

Compare dates

Inputs are posted to the same `/api/date-duration` contract as the package implementation.

Counting mode

Choose whether the final calendar date counts.

Samples

Load common date comparisons.
Ready to calculate exclusive UTC days from 2026-01-01 to 2026-12-31.

Duration result

Run a comparison to see totals, calendar span, and a shareable summary.

Choose a start date, end date, and counting mode to compare calendar spans.

Related tools and guides