[#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 the specified `year` and `dayOfYear` represent a valid value for a `Date` object, and `false` otherwise. `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 `[1 .. 9999]` inclusive. See {Valid Date Values and Their Representations} for details.

== Synopsis

Declared in `<bdlt_date.h>`

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


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