Note: This version of Teamwork Desk is no longer supported. 
Check out our help docs for the new version of Teamwork Desk here.

Within Teamwork Desk, you can change your timezone and time format from your profile section.

Click your profile icon to the top right of Desk and select View Profile from the dropdown.

You will then be brought to your profile page. Scroll down the page to change your timezone and time format.

For more information, see: My Profile - An Overview