Native Clock Can Show 2 Time Zones

I discovered this today on my 9900 running OS 7.1.0.74 and confirmed it also works on my wife's 9780 running OS 6.0.0.668. Not sure about OS 5 devices. In Options, Date & Time, it allows you to change your time zone. I'm sure we're all aware of this. What I didn't know was that in the native Clock app, when you go to options, it allows you to choose HOME time zone. This is a very important distinction. If the time zone differs from HOME time zone, the clock app will show 2 different time zones. This would have been good to know because I recently travelled to Brunei and it was 16 hours ahead of my home time zone in Vancouver.