Two of the Time Zones are special because they cannot be edited, but they can be applied to doors directly (for Free Access through doors) and/or doors in Departments (to apply Time Zones to Doors in a Department). Time Zone '00' is no access and '01' is 24 hour, 7 day access. The remainder can be edited to suit your requirements.

Each Time Zone is set for the same hours every day, then applied to the days of the week.

TIP
You should avoid trying to be too accurate with times, instead allowing a spread either side of the times you require. This prevents card holders standing at the door, waiting for a time zone to start.