Go to “Edit Account” tab
Here you can change the home location address and set your time zone.
You can also move the home icon.
Tap the show map button halfway down the page.
This brings up a map with the home icon on.
To move the Home icon, press and hold on the icon until it gets picked up, you can then drag it to the location you want to move it to.
Once you are happy, press the update button at the bottom of the page to save the changes.