Week of year (ISO)

Client

ISO-8601 week number for planning and reporting.

About Week of year (ISO)

ISO week number for YYYY-MM-DD date. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.

How to use this page

Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.

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Nearby workflows on Toolcore

  • ISO week date — Show ISO-8601 year-week-day for a calendar date. when the same instant should appear as epoch, zone, or cron.
  • Calendar quarter — Q1–Q4 and year from an ISO date. when the same instant should appear as epoch, zone, or cron.
  • Unix timestamp converter — Epoch to date: seconds, milliseconds, ISO-8601, UTC and local time—in browser. when the same instant should appear as epoch, zone, or cron.
  • Schedule tools — Unix epoch and ISO conversion, ISO-8601 duration parse/build, cron expression parsing, and multi time zone comparison—index of time utili… when the same instant should appear as epoch, zone, or cron.

Common use cases

  • Week of year (ISO) for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Use q or qb for the main text field when supported.

More tools

Related utilities you can open in another tab—mostly client-side.