Yes, just follow these steps:

1. Ensure that Yahoo! Autosync is running by looking for the icon in the taskbar.
2. Click the icon and select Preferences from the menu options.
3. Click Advanced Settings and confirm that you are an advanced user.
4. Choose Calendar.
5. Click Setup.
6. Click Next twice.
7. Select “Transfer items within a range of days.” Specify the number of days before and after today to transfer.
8. Click Next, then click Finish.
9. Click OK. If you want to perform the sync now, click Sync Now in the Autosync menu.