This article is for Outlook Web App, which is used by organizations that manage email servers running Exchange Server 2013 or 2010. If you're using Office 365 or Exchange Server 2016, your email program is Outlook on the web. For help with Outlook on the web, see Get help with Outlook on the web.
To get to the Calendar options page from the main Outlook Web App page, go to the upper corner and choose Options, then choose Calendar from the list in the navigation pane.
After you change the settings on this page, click Save to apply your changes.
Show Week Numbers Select this check box if you want the calendar to show the number associated with the week. By default, this isn't selected.
First day of the week Use this list to select the first day of the work week. This setting is affected by the language and locale options you've selected. By default, for U.S. English, Sunday is selected.
Use this section to define your work days. By default, the work days are Monday through Friday. You can also specify what time you start and end your day.
Show week as Use these check boxes to select the days your work week will include. The days you select appear in your calendar as work days.
Day start time Use this list to select the time you want to start your work day. Selecting a start time informs other users when your work day starts so they can check your availability and schedule meetings.
Day end time Use this list to select the time you want your work day to end. Selecting an end time informs other users when your work day ends so they won't schedule meetings after your work day ends.
To learn more about the light version of Outlook Web App, such as how to get back to the regular version or what the features and limitations are, see Outlook Web App Light.
To learn how to use the calendar, including how to create a new calendar, rename your calendar, or delete a calendar, see Outlook Web App Light > Calendar