-16038 THE ARGUMENTS OF FN:DATETIME HAVE DIFFERENT TIMEZONES. ERROR QNAME=ERR:FORG0008.

Explanation
The function fn:dateTime includes arguments that
reference different time zones. The time zone of either argument might
be an explicit part of the value or the result of using the implicit
time zone for the XQuery execution
environment for the argument.

System action
The XQuery expression
is not processed.

Programmer response
Make sure that the same time zone is used
for both arguments of function fn:dateTime.

SQLSTATE
 10608