Template:Which calendar/doc

Usage

The {{Which calendar}} template is a variant of {{Clarification needed}} to be used specifically when the clarification that is needed is the calendar in which a particular date is expressed.

At various times in modern history, multiple calendars were in use at the same time. Therefore, in an article on Russian history, a date such as "March 1, 1881" may be ambiguous: it might mean March 1 [O.S. March 13] 1881, or it might mean February 17 [O.S. March 1] 1881.

You may use either of the following formats:

{{which calendar|{{subst:DATE}}}}

or

{{which calendar|date=April 2026}}

This template will place articles into Category:Articles containing ambiguous dates.

To fix the issue, use the {{OldStyleDate}} template to clarify the meaning of the date:

{{OldStyleDate|March 1|1881|March 13}}

which produces

March 1 [O.S. March 13] 1881

Redirects

• {{What calendar}}
• {{What calendar?}}
• {{Which calendar?}}

See also

• {{Which}}, {{Clarification needed}}
• {{OldStyleDate}}, {{OldStyleDateDY}}, {{OldStyleDateNY}}

TemplateData

This is the TemplateData documentation for this template used by VisualEditor and other tools; click here to see a monthly parameter usage report for this template.

TemplateData for Which calendar/doc

For tagging ambiguous dates which might plausibly be interpreted differently according to multiple calendars in use at the time.

Template parameters[Edit template data]

This template prefers inline formatting of parameters.

Parameter		Description	Type	Status
Link target	link	Change what "which calendar?" text links to Default MOS:OSNS	Page name	optional
Month and year	date	Month and year of tagging; e.g., 'January 2013', but not 'jan13' Auto value {{subst:CURRENTMONTHNAME}} {{subst:CURRENTYEAR}}	String	suggested