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Regular users can share calendars with regular and external users, collaborators, and user groups, unless their access role restricts them.
Navigate to the relevant calendar.
Right-click the calendar that you want to share.
Select Share 1 from the menu that appears.
Start typing the name of the user you want to share the calendar with in the search bar 2 and select them from the drop-down list when they appear.
Select the access role for the user: 3
Users on Enterprise accounts can create and customize access roles and add/delete permissions for the editor role.
Full: all user rights available.
Editor: user can add tasks to the classic calendar and share/unshare the calendar.
Read-Only: user can view the calendar but can’t make changes or share the calendar with other users.
Click Save. 4
Your calendar and all its layers are shared with the selected users.