The Calendar has 2 display modes - Monthly and Detail . The primary difference is in the visibility and access of event detail.
The Monthly view shows every event title on the day of the event. Clicking the title opens a window with the event information.
The Detail view shows no event titles but allows display of all events for a week by selecting the week range link. This view is accessed by clicking the Detail Event Search button. Once in this view, clicking on the Month link at the top of the week range columns returns to the Monthly view.
Also available in the Detail view are additional options for finding events - Search by Keyword and Sort By. Give these a try so that you understand the different ways that you can retrieve information.