[#BloombergLP-bdlt-Calendar-addHoliday]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/Calendar.adoc[Calendar]::addHoliday
:relfileprefix: ../../../
:mrdocs:

Mark the specified `date` as a holiday (i.e., a non‐business day) in this calendar. Extend the valid range of this calendar if necessary. If `date` is already marked as a holiday, this method has no effect. See {Iterator Invalidation} for information regarding which iterators are affected by the use of this method.

== Synopsis

Declared in `<bdlt_calendar.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
addHoliday(xref:BloombergLP/bdlt/Date.adoc[Date] const& date);
----


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