Greg Day (born February 25, 1977 in St. Clair Beach, Ontario) is a Canadian ice hockey forward currently playing for the Graz 99ers of the Erste Bank Eishockey Liga. Day spent four seasons playing for Bowling Green State University before turning pro in 2002. He spent the next two seasons playing in the ECHL for the Peoria Rivermen and the Las Vegas Wranglers and in the American Hockey League for the Worcester IceCats and the Lowell Lock Monsters. In 2004, Day moved to the European leagues and spent one season in France's Ligue Magnus for HC Mulhouse and then spent one season playing in Norway's GET-ligaen for Vålerenga Ishockey before joining Graz in 2006. Day had a short spell in Italy's Serie A for Milano Vipers during the 2007-08 season but eventually return to Graz.