This morning you can catch the International Horse Parade. It begins in La Sabana at 11 a.m., and makes its way to Parque La Merced. My recommendation is to stand somewhere near the end and at some point make a stop into La Iglesia Merced. It was recently remodeled, of neogothical style and very unique to architecture in downtown San Jose.
This evening at 7 p.m. you can take a look at what young central american videographers are up to at the Festival de Video Joven La 240. This festival will run all week and show the video works in the open-air theater at CENAC (old Fanal). 60 works will be shown today thru Fri. and the festival will end with an awards ceremony at El Lobo Estepario, which is a bar themed after a movie theater and one of my downtown favorites.