DB2 SQL fun with date and times

The system is very picky and requires the XML element to display the date and time like this:

< CreatedDateTime >2018-02-15T17:30Z

The time must be in UTC format and contain that T before the time and that Z after the time.

My DB2 SQL has this:

VARCHAR_FORMAT(CURRENTTIMESTAMP-CURRENTTIMEZONE,'YYYY-MM-DDHH:MI')asCREATEDDATETIME

It would work except for the T and the Z. We've tried to hard code in these characters like:

,VARCHAR_FORMAT(CURRENTTIMESTAMP-CURRENTTIMEZONE,'YYYY-MM-DD, 'T',HH:MI','Z')asCREATEDDATETIME

But the VARCHAR_FORMAT() doesn't like those characters.

Any suggestions?