[#BloombergLP-bdlt-DatetimeUtil-fromYmdHms]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/DatetimeUtil.adoc[DatetimeUtil]::fromYmdHms
:relfileprefix: ../../../
:mrdocs:

Return an optional `Datetime` built from the specified clock fields.

== Synopsis

Declared in `<bdlt_datetimeutil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
xref:bsl/optional-072.adoc[bsl::optional<Datetime>]
fromYmdHms(
    int year,
    int month,
    int day,
    int hour,
    int minute,
    int second,
    int millisecond = 0,
    int microsecond = 0);
----

== Description

Return an `optional` having a `Datetime` with the specified `year`, `month`, `day`, `hour`, `minute`, `second`, and the optionally specified `millisecond` and `microsecond`, if those form a valid `Datetime` (see `Datetime::isValid`); otherwise return an `optional` without a value.

== Return Value

optional containing a valid `Datetime`, or empty if invalid

== Parameters

[cols="1,4"]
|===
| Name| Description
| *year*
| calendar year
| *month*
| month of year
| *day*
| day of month
| *hour*
| hour of day
| *minute*
| minute of hour
| *second*
| second of minute
| *millisecond*
| optional millisecond
| *microsecond*
| optional microsecond
|===


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