[#BloombergLP-bdlt-Calendar_BusinessDayConstIter-operator_dec]
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Regress this iterator to refer to the previous business day in the associated calendar, and return a reference providing modifiable access to this object&period; The behavior is undefined unless, on entry, this iterator references a valid business day that is not the first business day for the associated calendar&period;

== Synopsis

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

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xref:BloombergLP/bdlt/Calendar_BusinessDayConstIter.adoc[Calendar&lowbar;BusinessDayConstIter]&
operator&hyphen;&hyphen;();
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