The timezone setting for your Hospitable.com account is used to display any time details in your dashboard, such as when a message was received or sent.
Changing this could be helpful for seeing times correctly if you're going to be in a new timezone for a while.
The timezone can be changed in your Account Preferences by:
Click on Settings
Click on Preferences
Click on Account preferences
Click on the drop down box below Timezone, and select your preferred timezone.