Set Up Calendar
If you want Calendar to work the way you do, set it up right from the start. Add cloud accounts, such as iCloud or Google, so you can see a calendar from work or share calendars across all your devices.
Finally, learn about the many ways you can Customize Calendar, including when a week begins and how many days are in a week.
Connect Calendar to iCloud
When you use iCloud with Calendar, your events appear on all your other devices—your iPhone, iPad, Mac, or Apple Watch—that use the same iCloud account. Make a change on one device and it appears automatically ...