iCloud User Guide
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What is iCloud Calendar?
You can create and manage calendars for all areas of your life by using Calendar on iCloud.com. Changes you make appear automatically on iCloud.com and wherever you set up iCloud for Calendar, including the Calendar app on your iPhone, iPad, iPod touch, or Mac, or Microsoft Outlook on a Windows computer.
You can also share your calendars and invite others to events.
Calendar alerts also appear in Notification Center on your iOS and iPadOS devices and Mac computers.
To use iCloud Calendar, go to icloud.com/calendar and sign in with your Apple ID. Make sure you use a browser recommended in the Apple Support article System requirements for iCloud.
If you’re already using another iCloud feature, click the feature’s name at the top of the iCloud.com window, then click Calendar.
If you don’t see Calendar on iCloud.com, your account is limited to iCloud web-only features. To gain access to iCloud Calendar and other iCloud features, set up iCloud on an iPhone, iPad, iPod touch, or Mac.