Open Outlook
Go to the Calendar view
Select the calendar you want to share
Right-click the calendar
Click Share or Sharing Permissions
Enter the email address of the person you want to share with
Choose the permission level
Click Send or Share
Open the sharing invitation if needed
Accept the invitation if you are the recipient
To create a new calendar, click Add Calendar or New Calendar
Name the new calendar
Save the calendar
Repeat the sharing steps for the new calendar
To stop sharing, open Calendar Permissions
Remove the person or change their permission level
Save the changes