Click Work Schedule in the configuration manager to manage work schedules for your team. 

Click + New Work Schedule to create a new one.

After this, you can add a name to each calendar and choose:

• the number of working days per week;

• time zone;

• the amount of work hours per day;

• everyday breaks;

• the days when your team is on holiday;

The time spent on issues in each status will be calculated according to your specific calendar. 

Also, in you Work Schedule you can edit, copy or delete each work schedule