[#BloombergLP-bdlt-Datetime-operator_plus_eq-0f]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/Datetime.adoc[Datetime]::operator+=
:relfileprefix: ../../../
:mrdocs:

Add the specified time interval `rhs` to this datetime.

== Synopsis

Declared in `<bdlt_datetime.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bdlt/Datetime.adoc[Datetime]&
operator+=(xref:BloombergLP/bsls/TimeInterval.adoc[bsls::TimeInterval] const& rhs);
----

== Description

Add to this object the value of the specified `rhs` object, and return a reference providing modifiable access to this object. If `24 == hour()` on entry, set the `hour` attribute of this object to 0 before performing the addition. The behavior is undefined unless the resulting value is valid for `Datetime` (see `isValid`).


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