Date and weekday disagree
date-weekday-mismatchon by defaultJapanese / English
A date and its weekday that disagree, such as "Friday, 1 October 2026"
Example
How to fix
Check which is right, the date or the weekday, and correct the other.
Why it matters
When a date and its weekday disagree ("Friday, 1 October 2026"), the reader has to find out which one is right. It happens when a schedule is copied, or reused for another year. A date written without its year ("Friday, October 9" in an email) is checked as the date in the year that puts it within five months of the dated date just before it (or, with none before, the first one in the document).
What it does not flag
A date without its year is not checked when the document gives no date with a year, or when it is more than five months from the dated date and could be in either year. A page's revision date ("Last updated June 10, 2026") does not give a yearless date its year when the text has other dates with a year.
Turning it off or relaxing it
Technical details
- Layer
- L3
- Status
- stable
- Severity
- error
- Languages
- Japanese and English
- Suited to
- business, technical, blog, legal, docs, academic, literature, speech
- Reads from the document
- dates
Levels
Set a level for this rule under rules in chaff.yaml. With nothing set, it runs at the level its genre gives it (see By genre below).
| normal | error |
|---|---|
| relaxed | warning |
This rule has no limit to count to. A level sets how a finding is marked: relaxed keeps the finding and marks it a step lower.
By genre
- Runs by default in
- technical/spec, technical/readme, blog/tech, blog/essay, blog/owned-media, business/proposal, business/report, business/email, business/press-release, business/meeting-notes, legal/contract, legal/statute, legal/judgment, legal/patent, docs/manual, docs/faq, docs/glossary, academic/paper, speech/address, speech/transcript
- Turned off by the genre in
- literature/fiction, literature/essay, literature/poetry, literature/play
Message
{date} is a {actual}, not a {written}
This page is built from the rule's definition file:packages/chaff/rules/date-weekday-mismatch.yaml