The '''df''' (day first) parameter indicates the intended date format to display. It is switched on by setting it to "y" or "yes" e.g. '''df=yes''' or '''df=y'''.
The default output of this template is the month before the day (American-based style). This default may not be appropriate in articles about people from parts of the world where the day precedes the month in a date (e.g. Europe). In such cases the parameter df should be set.
It is possible to use similar parameter "mf" to stress the month-first format so that relying on the default does not lead an editor or [[WP:bots|bot]] to change the format to an unintended value; however, it is ignored by the template itself. (So, should both parameters be mistakenly used at once, df takes precedence.)
Examples:
:<nowiki>{{Death date and age|1993|2|24|1941|4|12|df=yes}}</nowiki><br> displays "{{Death date and age|1993|2|24|1941|4|12|df=yes}}"
:<nowiki>{{Death date and age|1993|2|24|1941|4|12|mf=yes}}</nowiki><br> displays "{{Death date and age|1993|2|24|1941|4|12|mf=yes}}"
=== Specific date unknown - alternate templates ===