This useful tip comes courtesy of the Flickr blog , which just displayed a gorgeous variety of photos from California's recent Maverick Surf Competition. The competition was held several miles south of my home city of San Francisco, but I missed the excitement this year. Luckily, there was no shortage of beautiful photographs taken during the event, and after using Flickr's advanced search  page, I was able to find hundreds.
Simply searching for "Maverick surfing" yields results tagged as such for all years of the contest. But setting the date to limit the search to photos taken after February 12 (the contest was on the 13), returns results from only this year's contest. This handy search tip works well for any event with a specific date — you can even narrow the range to include photos taken on one date only.
Source: Flickr User jurvetson