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In the permissions box, click the Down arrow choose an option. A specific person or group-Under Share with specific people, click Add People add the email address of the individual or group you want to share the calendar with. To share the calendar, ask users to subscribe to the calendar, or share the calendar with an individual or group. Everyone in your organization-Under Access permissions, check the Make available for your organization box. Point to the shared calendar and click More Settings and sharing. On the left, click the name of your new calendar.
You can share a calendar across your entire organization or with a specific person or group.
Add the name of the calendar (for example, Marketing Team Calendar), a description, and a time zone. On the left, next to Other calendars, click Add Create new calendar.