[#BloombergLP-bdlt-ProlepticDateImpUtil-ydToMonth]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/ProlepticDateImpUtil.adoc[ProlepticDateImpUtil]::ydToMonth
:relfileprefix: ../../../
:mrdocs:

Return the month of the date value indicated by the specified `year` and `dayOfYear`. The behavior is undefined unless `isValidYearDay(year, dayOfYear)` returns `true`.

== Synopsis

Declared in `<bdlt_prolepticdateimputil.h>`

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


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