Hi,
You cannot add Yahoo account to calendar app in Windows 8. However, you may get your Yahoo Calendar to import into Windows 8 App. Refer to the following steps:
You will need to have a calendar set up in Yahoo and Windows 8 signed in to your Microsoft Account. For more information on setting up Microsoft Accounts, visit **http://windows.microsoft.com/en-us/windows-8/microsoft-account-tutorial**.
- Share your Yahoo Calendar.
- Log in to https://calendar.yahoo.com.
3 In the left-hand column under Calendars, you should find the name of your calendar (such as Benjamin's_Calendar).
- Click on the gear symbol on the right to Manage Calendars.
- Choose "Share..." from the options that appear.
- In the "Share..." popup box, choose the calendar you want to share, and click "Continue."
- Find the "Share with iCal Address" section and copy the web address. It will look something like **http://calendar.yahoo.com/benjamin/f0c6f0bda6505b96872795d06902f/ycal.ics?id=150**.
- Click "Save."
- Link your Yahoo Calendar to your Windows Live Calendar.
- Login to https://calendar.live.com.
- Along the top menu bar click the "Import" option.
- In the left hand menu bar, choose "Subscribe."
- In "Calendar URL" paste the iCal link you copied from Yahoo in Step #7.
- Give your calendar a name and select a color for your Yahoo events.
- Click "Subscribe."
- You should now see your events from Yahoo Calendar in Windows Live Calendar.
- Open your Windows 8 Calendar app.
- Press F5 to sync the app with your Windows Live account.
- You should now see your Yahoo Calendar events in the Windows 8 Calendar app.
Troubleshooting
- If your Yahoo Calendar events from Windows Live don't appear, make sure Windows 8 is signed in to your Microsoft Account.
- Using the Charms menu or Windows Key-I, open "Settings."
- At the bottom of this menu, choose "Change PC Settings."
- Choose "Accounts." You should see your user name and the e-mail address you used to sign up for your Microsoft Account.
- If you are not signed in to your Microsoft Account, select "Sign in to your Microsoft Account" and complete the sign-in process.
Please reply us on the status to assist you further.