I made a watchapp which shows automatically the local time and the time at home - where ever you are.
The watchapp can be found can be found here:
The only thing needs to be done is to store the UTC offset of the home time. This is just been done by pressing the middle button long when you are at home. Further the watch can't know whether Day light saving is valid at home or not (imagine you are in a country without day light saving). This can be adjusted by the up and down buttons and is stored as well.
I travel a lot for my job and was what I always wished.
The field test is a bit tricky and haven been done yet but it should work and I will see on my next journey in the coming week.
httpebble is a great concept for such application and pretty well documented (!). Thanks -> Katherine great job. Hope to see more apps utilizing this