The {{Which calendar}} template is a variant of {{Clarify}} 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=July 2024}}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
TemplateData for Which calendar
For tagging ambiguous dates which might plausibly be interpreted differently according to multiple calendars in use at the time.
| Parameter | Description | Type | Status | |
|---|---|---|---|---|
| Link target | link | Change what "which calendar?" text links to
| Page name | optional |
| Month and year | date | Month and year of tagging; e.g., 'January 2013', but not 'jan13'
| String | suggested |
