The Week view displays events for the current week. To use this view, just click on the Week button in the top-right corner of your calendar. The current day (today) will be marked with a yellow background.
Use the single arrows in the top-left corner of the calendar to move forward or backward by a week. To switch to the Day view (for any particular day), just click on a date displayed at the top of the Week view, or click on a date in the mini-calendar. Click Today to return to the current day.
All-day events will be displayed at the top of the day. If there are more events than what's displayed, a down arrow will appear, which you can click to show the events. You can also click the plus button on the left to expand the All-day events area.