I have heard about carnival in places like Brabados trinidad in the Caribbean. Does any one know what time of year these festival occur?:p

They are throughout the year.
Here are some of them for that area:
http://www.caribbean-search.com/carnival.htm

Wassup man... ummm de very best of carnival happen about and around the months of February and march... that would be your best bet..! And isz always the Monday and Tuesday before ASH WEDNESDAY.. HAve fun if you ever decide to go.