Timezones are important for a scheduling service, because they help make sure your content gets posted at the right time. Your lunchtime might not be when our brave, little server eats his energy bars.
Initial Timezone Setup
Once you sign up for ThreadStart, one of the first things, that will happen is setting your timezone. To do so ThreadStart guesses your timezone. From then on all times (like in your calendar or when you schedule postings) will reference this timezone, so you always get presented with your accurate home time.
Changing Timezones
Occasionally you might want to change your timezone, though. Maybe you're moving into a different country or travel as a digital nomad. In order to make sure, the times in ThreadStart make sense to you, you can change your timezone.
To do so,
head into your account settings
scroll down to "Account Timezone"
select a new timezone from the list next to the account

If you have multiple accounts, you can change the timezones for each account individually. This can be useful for example when you have a company account that serves a different geographical market than your current home.
So, a digital nomad living in East Asia might use a different timezone for his online business that serves US customers.