[#BloombergLP-bdlt-Datetime-addHours]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/Datetime.adoc[Datetime]::addHours
:relfileprefix: ../../../
:mrdocs:

Add the specified number of `hours` to the value of this object, adjusting the "date" part of the object accordingly. Return a reference providing modifiable access to this object. If `24 == hour()` on entry, set the `hour` attribute to 0 before performing the addition. The behavior is undefined unless the resulting value is in the valid range for a `Datetime` object. Note that `hours` may be positive, negative, or 0.

== Synopsis

Declared in `<bdlt_datetime.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bdlt/Datetime.adoc[Datetime]&
addHours(xref:BloombergLP/bsls/Types/Int64.adoc[bsls::Types::Int64] hours);
----


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