To change your working days and working times in Outlook, do the following:
1. On the File tab, click the Options button:
2. In the Outlook Options dialog box, on the Calendar tab, under Work time:
- Modify Work hours
- Select workdays by checking of days
- Choose the First day of week and, if it needed, the First week of year.
Note: Unfortunately, Outlook does not allow custom shifts:
- Different times for different days of the week,
- The transition of working time in a day, when a work shift begins in the evening and ends in the morning. In this case, Outlook displays the message:
To verify the new settings, create a meeting request and click the Scheduling Assistant. It will show the updated work hours and display Monday as a non-working day for you. However, only Exchange users get the full benefits of work time settings because it allows other users to check this information in the Scheduling Assistant.