Calendaring in Office 365
Your Office 365 calendar enables you to keep track of events, appointments and meetings. You
can have multiple calendars, share your calendar and link to other people’s calendars. Access your Office 365 calendar via the Office Web App (OWA).
Microsoft's webpage on setting up and using the Calendar is at Calendar Overview.
Because of the shared nature of Exchange calendars, it is important to carefully consider the privacy settings on your calendars. More information on privacy and your Office 365 calendar can be found on the Office 365 Privacy