[#BloombergLP-bdlt-Datetime-setDatetimeIfValid-0b]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/Datetime.adoc[Datetime]::setDatetimeIfValid
:relfileprefix: ../../../
:mrdocs:

Set the "date" part of this object to have the value represented by the specified `year`, `month`, and `day` attributes, and set the "time" part to have the value represented by the optionally specified `hour`, `minute`, `second`, `millisecond`, and `microsecond` attributes, if the eight attribute values (collectively) represent a valid `Datetime` value (see `isValid`). Unspecified trailing optional parameters default to 0. Return 0 on success, and a non‐zero value (with no effect) otherwise.

== Synopsis

Declared in `<bdlt_datetime.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
setDatetimeIfValid(
    int year,
    int month,
    int day,
    int hour = 0,
    int minute = 0,
    int second = 0,
    int millisecond = 0,
    int microsecond = 0);
----


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