Week of year (ISO)
ClientISO-8601 week number for a date—week-year aware.
Week 26
Nearby workflows on Toolcore
- ISO week number — ISO 8601 week number and Monday–Sunday bounds for any calendar date—local browser calculation. when the same instant should appear as epoch, zone, or cron.
- Day of year (1–366) — Ordinal day number within the calendar year. when the same instant should appear as epoch, zone, or cron.
- Weekday name from date — Return English weekday for an ISO date. when the same instant should appear as epoch, zone, or cron.
- 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.
About this tool
ISO week number for reporting—aligns with iso-week tool for deep dives.
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.
ISO week number
ClientISO 8601 week number and Monday–Sunday bounds for any calendar date—local browser calculation.
Day of year (1–366)
ClientOrdinal day number within the calendar year.
Weekday name from date
ClientReturn English weekday for an ISO date.
Cron expression helper
ClientHuman-readable schedule, next run times—standard 5-field cron in your browser.