Length of a Workday
The calendar shows your default workday, but it might not reflect the hours you are actually at work. By default, your working hours for future dates are denoted by a line that represents the beginning of your workday, and another line that represents the end of your workday. You can change the start time and the end time of your workday.
Note: If you are viewing the current day, then the (start time) line
represents the current time, if the current time is later than the
value specified in your Working Hours Start At preference setting.
Otherwise, the (start time) line represents the value specified in
your Working Hours Start At preference setting.
To change the start time and end time of your workday
From the application-level menu, choose Tools, then User Preferences.
The User Preferences screen appears.
Navigate to the Calendar view.
The Calendar form appears.
Enter the calendar start time in the Working Hours Start At field.
Enter the calendar end time in the Working Hours End At field.