Spring seems to be a little early this year -- and so are Washington's St. Patrick's Day celebrations. Starting Friday, the Renwick Gallery is holding a free Irish-dance party with songs performed by local groups, including the Irish Tradition. You can learn Irish set and step dances and sample traditional foods Friday night from 7:30 to 10, and Saturday 2 to 4 in the gallery's grand salon on the second floor. On Saturday in Old Town Alexandria, a "dog fun fair" leads off the special events, with categories from biggest to smallest to adult owner/dog lookalike. All breeds are eligible; registration closes at 9:15. The fair runs 9 to 11:30 and the entry fee is $2. At noon, former Redskins quarterback and sports commentator Sonny Jurgensen will lead the annual St. Patrick's Day parade through Old Town from the intersection of King and Alfred streets, then east to Market Square for an old-fashioned Irish "hooley." Parade-goers and marchers can dance outside to live Irish music and ready themselves for the rest of the weekend's merriment. D.C. is also celebrating St. Patrick's Day with its own parade starting Sunday at 1, down Constitution Avenue between Seventh and 17th streets NW. Before the marching, there's going to be a pre-parade party with Irish dancing and singing at noon in front of the parade grandstand between 15th and 16th streets NW on Constitution Avenue. You can buy grandstand seats starting at 11 o'clock for $3. After Ireland, you're invited over for some Finnish fun at the Kalevala Day celebration at 3 in George Washington University's Marvin Theater, 21st and H streets NW. The program highlights Finland's folk and lore through music, poetry, dance and food, all for $4. Call 933-1664.