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

Return `true` if the specified attributes represent a valid `Datetime`.

== Synopsis

Declared in `<bdlt_datetime.h>`

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

== Description

Return `true` if the specified `year`, `month`, and `day` attribute values, and the optionally specified `hour`, `minute`, `second`, `millisecond`, and `microsecond` attribute values, represent a valid `Datetime` value, and `false` otherwise. Unspecified trailing optional parameters default to 0. `year`, `month`, `day`, `hour`, `minute`, `second`, `millisecond`, and `microsecond` attribute values represent a valid `Datetime` value if `true == Date::isValidYearMonthDay(year, month, day)`, `0 <= hour < 24`, `0 <= minute < 60`, `0 <= second < 60`, `0 <= millisecond < 1000`, and `0 <= microsecond < 1000`. Additionally, a valid `year`, `month`, `day` with the time portion equal to 24:00:00.000000 also represents a valid `Datetime` value.

== Return Value

`true` if the attributes form a valid `Datetime`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *year*
| year attribute
| *month*
| month attribute
| *day*
| day‐of‐month attribute
| *hour*
| hour attribute (default 0)
| *minute*
| minute attribute (default 0)
| *second*
| second attribute (default 0)
| *millisecond*
| millisecond attribute (default 0)
| *microsecond*
| microsecond attribute (default 0)
|===


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