If the official WDW site has the hours posted for the dates of your trip, go to the calendars for the parks and click on the date (i.e., click on the number 4 on the calendar square for the 4th of the month), and it will show parade and fireworks schedules for that date. As I recall, Fantasmic at MGM is shown an hour before park closing, and there are usually two shows when the park is open late during busy times. Illuminations in Epcot is consistently at 9 PM. I haven't been to MK at a busy time - I know Wishes is shown at park closing time when the park isn't open very late. Parades are usually mid-afternoon, like 3 PM. I'm sure other experts can be more specific.