:Category:Date of death unknown

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This category (and similarly :Category:Date of birth unknown) is intended for placement in biographical entries about deceased individuals, mainly historical, whose year of death is known, but the month and day are lost and not likely to be found. "Date of death unknown" may also be used for people from the more recent past who died in circumstances which mean their exact death date is unknown.

Historically-recent people whose date of death is likely to have been recorded and could be researched should be included in :Category:Date of death missing.

"Date of death unknown" and :Category:Year of death unknown, which is used with individuals whose end-of-life statistics are presumed to be irretrievably lost, as well as :Category:Year of death missing, are intended to be mutually exclusive.