Facebook gives you four different ways to find events you might want to attend:
Search for events by name or subject. You can find events using the same search box you use to look up Facebook members (Finding Friends).
Browse for events. Browsing lets you look at all the events scheduled during a specific time period, related to a certain network, or held for a particular reason. For example, you can find all the political rallies planned for your town in the next week.
Check out the events your friends plan to attend. There's a good chance you'll be interested in the activities your friends enjoy.
Take a peek at the most popular events. You can see a list of the hottest events in your networks based on RSVP activity in the past 24 hours.
If you know the name or subject of the event you're looking for—or at least a word or two of the name or subject—the easiest way to find it is to search for it directly.
It probably goes without saying, but for you to be able to look up a karate-related event, the event's creator had to put the word karate in the name of the event or somewhere in the description.
To do so:
In the Search box just above the Applications menu, type the name of an event or words you want to search for, and then hit Return.
You can also search for events using the search box on the Events page. To get there, click Events in the Applications menu.
On the search results page that appears, click ...