Hi, Sue! To check for parades, fireworks, and nighttime special events, you will want to check the calendars at
www.disneyworld.com. Choose DISCOVER near the top of the page, click on a park, then scroll down and select Calendars. This will give you a month view of each parks hours, Extra Magic Hours, and events. Click on a specific date to see what the hours are along with parades, fireworks, etc. Generally, fireworks and parades are only shown during regular park hours, but if the park is open later on a certain day, there will sometimes be a later parade as well.
Calendars are currently posting through May, 2009. Have fun planning how you will spend your Extra Magic Hours!