Sync or access your calendar on multiple devices and applications
Yahoo Calendar uses the CalDAV internet standard and iCal (ICS) file format to allow access to your calendar. You can sync or access your calendar across many applications, mobile devices, and desktop computers.
You can sync Yahoo Calendar with other CalDAV supported devices. Steps vary by device, but you must enter your Yahoo ID and password as well as the CalDAV URL associated with your account.
Enter this server URL in your device settings: https://caldav.calendar.yahoo.com
Yahoo Calendar syncs with applications that support the iCal (ICS) format. Consult the application user documentation or contact its manufacturer for support.
If your device doesn't support CalDAV, you can access your Yahoo Calendar by browsing to: https://calendar.yahoo.com
Sign in with your Yahoo ID and password.