Correct iCal errors, display problems, and buttons that do not work in the Yahoo calendar

If you have trouble adding your Yahoo Calendar to a mobile device or an application such as Apple Calendar or Mozilla Lightning, it is usually related to the iCal address. Most feature problems, such as buttons that don't work or display errors, can be resolved with general browser maintenance.

Unsupported devices

If your device does not support CalDAV (iCal), you can access your Yahoo Calendar through a mobile browser at https://m.yahoo.com/.

Resolve Error Messages

"Server Authentication Error"

If you cannot synchronize your Yahoo calendar with a device or application, the server name or login information may be incorrect.

1. To solve this problem, enter the correct server name in the configuration of your calendar tools:
2. Correct server name: https://caldav.calendar.yahoo.com
3. Verify that your login information works. Try logging into your Yahoo email account on a computer.
4. If your password includes special characters (such as '#' or '$'), change your password to exclude them, then update your password on the device and try to reproduce the problem.
5. If you are using an iOS device, try synchronizing your account with the Configuration Assistant.

"Please enter a valid iCal address"

This error occurs when the iCal address you are trying to subscribe to does not start with "http: //". To solve this problem, you must adjust the iCal address you are subscribing to by following the steps below '

1. In the iCal Address field, replace "webcals: //" with "http: //" in the URL.
2. Check that all settings are correct for your calendar.
3. Click on Continue.

Important Note: If you receive "Error code: 500" when you try to add a calendar with an iCal address, check with the owner of the calendar to make sure you have entered the URL correctly.