textlint-rule-date-weekday-mismatch

textlint rule that found mismatch between date and weekday.

OK:

Correct date and weekday.

2016-12-29(Thursday)
2016年12月30日(木曜日)

NG:

Incorrect date and weekday.

2016-12-29(Friday)

// Error:
2016-12-29(Friday) mismatch weekday.
2016-12-29(Friday) => 2016-12-29(Thursday)

Supported lang

Automatically detect language from your text!

• en
• ja(日本語)
• es
• fr
• zh

This rule depended on following library:

• wanasit/chrono
• Moment.js

Install

Install with npm:

npm install textlint-rule-date-weekday-mismatch

Usage

Via .textlintrc(Recommended)

{
    "rules": {
        "date-weekday-mismatch": true
    }
}

Via CLI

textlint --rule date-weekday-mismatch README.md

Options

• lang: string
  • Default: none(Automatically detect language)
  • Specify language for date string

{
    "rules": {
        "date-weekday-mismatch": {
            "lang": "ja"
        }
    }
}

For example, 2016-12-30 is en by default. But, You can specify 2016-12-30 is ja-JP text by options

{
    "rules": {
        "date-weekday-mismatch": {
            "lang": "ja-JP"
        }
    }
}

• useCurrentYearIfMissing: boolean
  • Default: false
  • If true, when the year is missing in the date string (e.g. 4月23日(月)), the current year will be automatically added for validation.
  • This is useful for documents that often omit the year in dates.

Example:

{
    "rules": {
        "date-weekday-mismatch": {
            "useCurrentYearIfMissing": true
        }
    }
}

If the text contains 4月23日(水), and the current year is 2025, it will be interpreted as 2025年4月23日(水) for the weekday check.

• currentYear: number
  • Default: the current year (from system date)
  • If specified, this value will be used as the year when supplementing missing years in date strings (used only when useCurrentYearIfMissing is true).
  • This is useful for testing or for documents that should always use a specific year for validation.

Example (using both options):

{
    "rules": {
        "date-weekday-mismatch": {
            "useCurrentYearIfMissing": true,
            "currentYear": 2025
        }
    }
}

If the text contains 4月23日(水), it will always be interpreted as 2025年4月23日(水) for the weekday check, regardless of the actual system year.

language format following ISO 639-1.

e.g.) en-US, en, ja etc..

• ISO 639-1 - Wikipedia
• Moment.js | Docs

Acknowledge

• 日付曜日矛盾 // Speaker Deck

Changelog

See Releases page.

Running tests

Install devDependencies and Run npm test:

npm i -d && npm test

Contributing

Pull requests and stars are always welcome.

For bugs and feature requests, please create an issue.

1. Fork it!
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -am 'Add some feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request :D

Author

• github/azu
• twitter/azu_re

License

MIT © azu