Purim Celebrations in Jerusalem All Photos UPI.com Jewish holiday: Underground party scene: Israelis celebrate Purim in air raid shelters RTL Today Red Holiday Dresses Nordstrom Why do Jewish people wear costumes on the Jewish holiday of purim? On Purim, we wear costumes to symbolize how the holiday's miracles were hidden within natural events. Just as Gd's intervention Holiday Dresses Dressed up or Down Sweet Salt Clothing What to Wear to a Holiday Work Party