Normalize this instance to UTC.
2000-03-04T23:00:00+03:00 normalizes to 2000-03-04T20:00:00Z
Implements W3C XML Schema Part 2, Section 3.2.7.3 (A).
this
XMLGregorianCalendar
14801481148214831484148514861487148814891490
Q.getTimezone() != DatatypeConstants.FIELD_UNDEFINED) { // Both instances have different timezones. // Normalize to UTC time and compare. P = (XMLGregorianCalendarImpl) P.normalize(); Q = (XMLGregorianCalendarImpl) Q.normalize(); return internalCompare(P, Q); } else if (P.getTimezone() != DatatypeConstants.FIELD_UNDEFINED) { if (P.getTimezone() != 0) {