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This is amaintenancecategory, used formaintenance of the Wikipedia project. It is not part of the encyclopedia and containsnon-article pages, or groups articles by status rather than subject. Do not include this category in content categories (except foreponymous maintenance categories).

This is atracking category. It builds and maintains a list of pages primarily for the sake of the list itself. They are not part of theencyclopedia's categorization scheme.

• This category ishidden on itsmember pages—unless the correspondinguser preference (Appearance → Show hidden categories) is set.
• These categories can be used to track, build and organize lists of pages needing "attentionen masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience.
• These categories also serve to aggregate members of several lists or sub-categories into a larger, more efficient list (discriminated by classifications).

Wikipedia articles (tagged in this month) that use mm dd yyyy date formats, whether by application of thefirst main contributor rule or by virtue ofclose national ties to the subject belong in this category. Use{{Use mdy dates}} to add an article to this category. SeeMOS:DATE.

This system of tagging or categorisation is used as a status monitor of all articles that use mm dd yyyy date formats, andnot as a clean up.

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• Monthly clean-up category counter
• Monthly clean-up category (Use mdy dates) counter
• Clean-up categories from October 2019