Information on system preferences
All tabs related to yourself (My Schedule, My Availability and My Requests) use the Time zone selected in the employee's profile and not the one for the organization.
Select Atlas scheduling from the left-hand navigation bar.
From the Atlas Scheduling area, click your initials in the top-right corner and select My Profile.
Under My Profile > System preferences, adjust the Time format to your preference. You can select "24 hours" or "12 hours" (AM - PM).
Click the Save button to lock in your changes.