Your web office Calendar is unique to you. On it, you might see personal
events that only you are involved in, as well as group-wide events that
all members of your site are invited to.
The events scheduled on your Calendar could be:
Personal events that you scheduled, such as doctor's
appointments, birthdays, and personal vacation time. Personal events have
a personal event icon beside them.
Group-wide events that all members of the site
are involved in, like company-wide meetings or annual holidays.
Meetings you've scheduled with other members.
Meetings that other people have invited you to.
You might be invited personally or because you are a member of a group.
Once someone invites you to a meeting, it automatically appears on your
Calendar.
Events added by your assistant, or other people
to whom you have given Manage access to your Calendar.
Can other members see my Calendar?
By default, other members are not permitted to see a detailed view of
your Calendar. They can only see when you are busy.
Other
members can see when you are busy. To facilitate scheduling meetings
with you, other members can tell when you are Busy, Free, Tentative, or
Out of the Office, but they cannot see any details about the events on
your Calendar. They see your availability when they schedule a meeting,
add your name as a Participant, and click the Check
Availability checkbox. By default they are not allowed to see any
details about the events on your Calendar, not even the titles of the
events.
Be sure to keep your availability up to date so other members do not
try to double-book meetings with you. When you're planning to be on vacation
or out of the office for any reason, make sure this is reflected in your
Calendar. When you have a vacation planned, for example, create an event
for your vacation and change the Show
time as indicator for this event to Out
of Office.
Members
see your Calendar details only if you give them authorization.
If you'd like, you can share your Calendar with members, giving them access
rights to view and/or manage your Calendar. For example, you might want
your assistant to see your Calendar and book appointments for you. Or
you might want your manager to know which clients you'll be visiting and
when. For these cases, share your web office Calendar with the members
of your choice. If you do not choose to share your Calendar, no one else
can see it, not even the site administrators.
People you share your Calendar with see your name in the "View
calendar for" drop-down list.
They see all your meetings and events, except the ones that you've marked
as "Private." If you give them Manage access, they can fully
manage your Calendar, scheduling new events and meetings for you, but
they may not accept or reject meeting invitations on your behalf.
beside them. 
