These categories can be used to track, build and organize lists of pages needing "attention en 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 dd mm yyyy date formats, whether by application of the first main contributor rule or by virtue of close national ties to the subject belong in this category. Use {{Use dmy dates}} to add an article to this category. See MOS:DATE.
This system of tagging or categorisation is used as a status monitor of all articles that use dd mm yyyy date formats, and not as a clean up.
Pages in category "Use dmy dates from January 2012"