Check that you can access secure websites. Open Safari and go to your Apple ID account page. If the website won't open, contact your Internet service provider for help.Open Safari and go to you can’t open the page, learn what to do. Then, check that you turned on Contacts, Calendars, and Reminders* in your iCloud settings. Make sure that you're signed in to iCloud with the same Apple ID on all of your devices.Make sure that the date and time settings on your iPhone, iPad, iPod touch, Mac, or PC are correct.If a reminder isn't showing up on some devices, make sure that you're running the latest iOS, iPadOS, or macOS on each device. Upgraded reminders and shared reminders in iOS 13 or later or macOS Catalina or later aren't compatible with earlier versions of iOS or macOS.Check the system status of iCloud Contacts, Calendars, and Reminders.Check if you still need help after each of the steps below.
