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

Add the specified `weekendDay` to the set of weekend days associated with the weekend&hyphen;days transition at January 1, 0001 maintained by this calendar&period; Create a transition at January 1, 0001 if one does not exist&period; See &lcub;Iterator Invalidation&rcub; for information regarding which iterators are affected by the use of this method&period; The behavior is undefined unless no weekend&hyphen;days transitions were added to this calendar via the `addWeekendDaysTransition` method&period;

== Synopsis

Declared in `&lt;bdlt&lowbar;calendar&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
addWeekendDay(xref:BloombergLP/bdlt/DayOfWeek/Enum.adoc[DayOfWeek::Enum] weekendDay);
----


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