You can create an all day or multi-day event such as a conference. The event displays at the top of the calendar for the day of the event.
The Calendar scheduling tool can assist you with finding the next-available free times and meeting locations across your organization. You can set up preferences for preferred meeting times, buildings, location and room size. As you enter attendee names the wizard begins to suggest times and locations in the Overview pane. You also have the option to look for a location for your meeting before adding attendees. If you set your location preferences, the location lists display their availability.
In any view except the Preferences view, click the arrow on 
and select Appointment.
The From field displays if you created more than one persona for your account. Select the identity to use when creating this appointment.
Enter the subject of the meeting. The Subject field is required. The subject becomes the description in the calendar.
Click All Day and select the start and stop date
Note: If the time zone is displayed, it reflects the time zone that you are in. You usually do not need to change this. When you schedule meetings with attendees in different time zones, the invitation is sent reflecting the meeting time in their time zone. For example, if you create a meeting with attendees in California and New York, the invitation displays Pacific time for attendees in California and Eastern time (three hours later) for attendees in New York.
If you want to find a location for your meeting before adding attendees, in the Overview Pane click Show Suggestions for <date> link. Click on the number to see a list of rooms. When you select a location, the room address is added to the Location field.
Enter attendee names. You can enter attendee names in any of the following ways:
In the Attendees field, type the email addresses, separating addresses by a semicolon (;). As you type, names in your Contact lists that match are displayed. The Scheduler shows any free/busy information that is available.
Click Attendees to search for addresses to add.
Open the Scheduler to see free/busy information as you enter attendee names. If attendees' schedules are known, availability appears in horizontal bars next to the names.
Optional Attendees. If some attendees are not required to be at the meeting, but you want to invite them, select Show Optional and type email addresses in the field, or in the Scheduler, click the icon next to the name and select Optional Attendee. When the invite is sent, their names are listed as optional.
Click Show Resources to select equipment to reserve.
In the Display section, select how your availability during this time should display in the Calendar. Select either free, tentative, busy, or out of office. If you have multiple calendars, select the calendar for this appointment.
You can mark the appointment as private.
To change when the reminder notification is sent, click the Reminder box. If you have configured an email address or SMS alert in your Preferences>Notification page, check the appropriate box, Email or SMS. If you have not configured a notification, click Configure to go to the Notification Preferences page to set this up.
Use the Text field to add additional information to include in the email. To add attachments, click Add Attachments on the tool bar.
In Options on the toolbar, you can disable Request Responses.
Click Send. An email invitation is sent to all attendees.
If you want to send the invitation at a later time, click Save. This saves a local copy of the appointment and invitations are not sent to the attendees.
If you are adding an appointment to a shared calendar, you may need to refresh the screen to see the appointment.