If you want others merely to know about a calendar or event, you can Broadcast Calendar Events. But broadcasting means the others viewing the calendar or event can’t modify it. If you want a family member or colleague to have full, read-write access to a calendar and/or reminder list, then syncing is what you want, although you’ll normally see this referred to as “sharing.”
When you “share” a calendar or reminder list with editing privileges, you and the other person each get a copy of the calendar on each of your devices, but any changes sync via the cloud. Most services that offer online calendars support some method of doing this; I cover iCloud and Google Calendar in this chapter.
Click the tiny button that appears next to the calendar name when you hover over it and then choose Share this Calendar ②.
For each person with whom you want to share the calendar, type the person’s email address, choose Make Changes to Events from the Permission Settings pop-up menu, and click Add Person.
Click Save.
Invitees will receive a notification that they must respond to in order to access the shared calendar.