With iCloud, you can create shared family calendars that appear on your Mac and iOS devices. You can add anyone with an iCloud account to the calendar and they can view, edit and add events. This makes it easy for a family to stay organized. You get notifications when someone changes the calendar. You can create many of these calendars for different subjects or different groups of people to share. If someone does not have a Mac or iOS device, it may be easier to use a Google calendar instead, which can still be accessed in the same Calendar apps on Apple devices.