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CONVERSION BAY
Compute the ISO 8601 week number and ISO week-year for a supplied calendar date, handling year boundaries where late December dates belong to week 1 of the next year.
WHAT THIS DOES
Runs entirely in your browser.
/tools/week-numberweek-numberv4.0.0LOCAL · LOCAL RUNIMPLEMENTED — This workbench is functional in the current release.Presets for this workbench
No preset yet. A preset stores the values in this form — never the result — and only for workbenches that run entirely in your browser.
Collections
Saved on this device only. Turn on sync to carry them to another device.
METHOD / LOCAL RUN
The Gregorian date is parsed as a local date, then the ISO 8601 week algorithm (Thursday-of-week rule) yields the week number and ISO year.
Boundary: ISO 8601 weeks only.
The calculation or transformation runs in your browser using the values entered above. No input is sent to UtilityForge for this tool.
EXAMPLES / LOCAL RUN FIXTURES
FAQ
ISO 8601 weeks only.
No. This published tool runs locally in your browser. UtilityForge does not send the values entered in this workbench to a server.
No. This workbench runs in the page: Date are read by the code your browser already downloaded, and UtilityForge receives neither the values nor the result.
RELATED TOOLS
LOCAL — Runs entirely in your browser.
COMMON USE CASES / SOURCE NOTE
Last reviewed:
Source information: Browser local Date construction and ISO 8601 week arithmetic. No calendar, scheduling, or remote service is used.