ISO week-year
ClientISO-8601 week numbering.
About ISO week-year
ISO week number and week-year from 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.
Nearby workflows on Toolcore
- Cron expression helper — Human-readable schedule, next run times—standard 5-field cron in your browser. when the same instant should appear as epoch, zone, or cron.
- Business days calculator — Count weekdays (Mon–Fri) between two calendar dates—inclusive, computed in your browser. when the same instant should appear as epoch, zone, or cron.
- Excel serial to ISO date — Convert Excel day serial to YYYY-MM-DD. 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.
Common use cases
- ISO week-year 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.
Cron expression helper
ClientHuman-readable schedule, next run times—standard 5-field cron in your browser.
Business days calculator
ClientCount weekdays (Mon–Fri) between two calendar dates—inclusive, computed in your browser.
Excel serial to ISO date
ClientConvert Excel day serial to YYYY-MM-DD.
Unix timestamp converter
ClientEpoch to date: seconds, milliseconds, ISO-8601, UTC and local time—in browser.