A DESCRIPTION OF THE PROBLEM :
The javadoc for the return value is wrong


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
@return month of this XMLGregorianCalendar.
ACTUAL -
@return year of this XMLGregorianCalendar.

URL OF FAULTY DOCUMENTATION :
https://docs.oracle.com/javase/8/docs/api/javax/xml/datatype/XMLGregorianCalendar.html#getMonth--