Changing %F-%H-%M-%S%z to %FT%H:%M:%S%z is not a matter of adding a "T", and a correct pattern was already posted.

In reply to Re^6: Print time in Date"T"time+Gmtoffset ( iso-8601 ) by ikegami
in thread Print time in Date"T"time+Gmtoffset by techman2006

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