Return true if the specified year, month, and day represents a valid date value, and false otherwise. Note that valid date values are (as fully defined in the component-level documentation) in the range [0001/01/01 .. 9999/12/31].
Declared in <bdlt_prolepticdateimputil.h>
static
bool
isValidYearMonthDay(
int year,
int month,
int day);