If you'd like to view event sign-ups for a specific volunteer, without having to search through each event in the calendar, you can do this by following these steps:
Go to your Organizer Dashboard
Click on the Volunteers tab, then click on the volunteer name under List of Volunteers
Click on Event RSVP's. There you will see a list of all of the events that a volunteer has signed up for and the date. You can also click on an event title to see details of the event in the Event Sign-Ups calendar.