[#BloombergLP-bdlt-Date-isValidYearDay]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/Date.adoc[Date]::isValidYearDay
:relfileprefix: ../../../
:mrdocs:

Return `true` if `year` and `dayOfYear` form a valid `Date` value&period;

== Synopsis

Declared in `&lt;bdlt&lowbar;date&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
bool
isValidYearDay(
    int year,
    int dayOfYear);
----

== Description

Return `true` if the specified `year` and `dayOfYear` represent a valid value for a `Date` object, and `false` otherwise&period; `year` and `dayOfYear` represent a valid `Date` value if they correspond to a valid date as defined by the Unix (POSIX) calendar confined to the year range `&lsqb;1 &period;&period; 9999&rsqb;` inclusive&period; See &lcub;Valid Date Values and Their Representations&rcub; for details&period;

== Return Value

`true` if `year` and `dayOfYear` form a valid `Date` value

== Parameters

[cols="1,4"]
|===
| Name| Description
| *year*
| year of the candidate date
| *dayOfYear*
| day of year of the candidate date
|===


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