Administrators
When an Administrator adds a team member to the company, there is an additional column which allows them to choose the team member's timezone.
An Administrator can also edit an existing team member's timezone by clicking on the three ellipses on the right hand side of the screen. 
Team Members
Team Members can edit their timezones by clicking 'My Profile' in the top right hand corner of their screen. This reveals the users personal information, including their timezone which can be amended.
