Depending on your office hours, you may want to change the range of hours your calendar displays on the Dashboard.
How to change the begin and end times on your Dashboard calendar view:
1. On your Dashboard, click the “My Settings & Preferences” button in the toolbar.
2. In the left column, you'll find a section called "Calendar & Alert Settings"
3. Change the values for “Calendar Daily View Starts at” and “Calendar Daily View Ends at" to your preferences
4. Be sure to scroll to the bottom and click the “Save Settings” button when finished
Your Dashboard calendar start and end times should now be updated. If you're not seeing the change on your Dashboard tab, log out then log back in to have the new settings take effect.