Version 4.6.2 of the Aerospace+H4 watchface added a 3rd time zone time display selection. The timezone is set by latitude and longitude settings and is daylight savings time adjusted, as opposed to the 2nd time zone time display, where the time zone is set manually by a UTC offset setting. In addition, whether or not DST in effect, is indicated. For example, if the display is "11:20A.SYD", the dot between the time and the time zone name indicates DST is currently in effect. "11:20A SYD" with no dot indicates DST is not in effect.
This is a PRO version feature only and requires a free ipgeolocation.io API key.