You can choose to look at your personal/group calendars in different views. You can choose to look at a monthly, weekly or a daily view of all your calendars.
Click on the 'Weekly View' button at the top of the page. This will bring up a calendar view of the current week with all the days of the week listed in there. Any events scheduled in that week are shown in the calendar on the days in which they are scheduled. Click on any date to look at the detailed information for that day. You can also add an event to the calendar by clicking the '+' sign next to the date on which you want to add the event. You can modify/change an individual event by clicking on it.