
On the Home tab, in the Arrange group, click the Month button to display your calendar for the month.check box on the Calendar page of the Outlook Options dialog box. To display week numbers in the Date Navigator and in the Month view of the calendar, select the Show Week Numbers. Because of the way the weeks are numbered, a year can end in Week 52 or (more commonly) in Week 53.

(For example, you can say you’ll be out of the office “Week 24” rather than “June 7–11.”) Week 1 is the calendar week in which January 1 falls, Week 2 is the following week, and so on through to the end of the year. Specific weeks are referred to in some countries or regions by number to simplify the communication of dates. When working in a list view, you can group calendar items by selecting a field from the Arrangement gallery on the View tab.

Just as you can with other Outlook modules, you can specify the way that Outlook displays calendar information (the view) and the attribute by which that information is arranged (the arrangement).
