Hello -

In the Calendar view, click Share My Calendar... from the left-hand
Navigation pane.
This will open up a window where you can Add someone from your address book
to see your calendar with different rights.
If you want EVERYONE to see your calendar:
In the Name box, click Default.
Under Permissions, in the Permission Level list, click the permission level
that you want.
For details about permission levels, see Outlook folder permissions.

You can create custom permissions by selecting the check boxes and options
under Permissions.

Hope that helps!
Angie