I think snowflake formats timestamp with time zone incorrectly when using the documented mask for ISO TIMESTAMP Foramts
alter session set TIMESTAMP_NTZ_OUTPUT_FORMAT ='YYYY-MM-DD"T"HH24:MI:SS.FFTZH:TZM';
select "last_update" from "sakila1"."actor" limit 1
results in
2006-02-15"T"12:34:33.000000000+00:00
Note that in the output the 'T' is surrounded by quotes, where as I believe the correct output should be
2006-02-15T12:34:33.000000000+00:00
With no quotes surrounding the 'T'.
Using a mask of YYYY-MM-DDTHH24:MI:SS.FFTZH:TZM seems to produce the correct output, but this conflict with the documentation, and the standard they are following.