Determine if a string is an ISO 8601 timezone
is_ISO8601_timezone.RdDetermine if a string is an ISO 8601 timezone
See also
Other ISO8601 String checking:
is_ISO8601_calendar_date(),
is_ISO8601_calendar_datetime(),
is_ISO8601_ordinal_datetime(),
is_ISO8601_time(),
is_ISO8601_week_datetime()
Other Date management and conversion:
dateany_to_date(),
generate_dtc(),
is_ISO8601_calendar_date(),
is_ISO8601_calendar_datetime(),
is_ISO8601_ordinal_datetime(),
is_ISO8601_time(),
is_ISO8601_week_datetime(),
make_dy(),
pattern_ISO8601_any_date(),
pattern_ISO8601_any_datetime(),
pattern_ISO8601_calendar_date(),
pattern_ISO8601_calendar_datetime(),
pattern_ISO8601_calendar_year(),
pattern_ISO8601_ordinal_date(),
pattern_ISO8601_ordinal_datetime(),
pattern_ISO8601_time(),
pattern_ISO8601_timezone(),
pattern_ISO8601_week_date(),
pattern_ISO8601_week_datetime(),
sdtm_dtc_to_datetime(),
sdtm_first_dose(),
sdtm_time_actual()