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This template will categorize resources into either Category:Resources needing sources or a monthly category like Category:Resources needing sources from December 2023, if a date is supplied.
This template also has one optional field.
The field is a date parameter, entered as
"date=month year". Adding this sorts the resource into subcategories of Category:Resources needing sources by month and out of the parent category, allowing the oldest problems to be identified and dealt with first.