Hi Theo,
It will be my pleasure to point you in the right direction. Here's what you need to do:-
1/ Go to the Walt Disney World website
2/ Click on "PARKS"
3/ Click on Disney's Hollywood Studios
4/ Click on Calendar (at the left hand side of the page)
5/ Click on the drop down box at the side of "View Month" which always displays the current month and choose May 2012.
6/ Click on the first day of your visit (For example
1 May 2012)
As you can see, Fantasmic is currently scheduled to take place at 9pm on this particular day.
To check the remaining dates of your stay, simply keep clicking on "Next Day"
If you are still having trouble finding the information, please feel free to ask us another question which includes the actual dates of your stay.
Wishing you a magical trip filled with memories which will last a lifetime!