Day, 19, has skated in 57 games with the Mississauga Steelheads and the Windsor Spitfires of the Ontario Hockey League (OHL) this season, registering 14 goals and 17 assists for 31 points, along with a plus-19 rating and 22 penalty minutes. He has established OHL career-highs in goals and shots on goal (176) this season, and his plus-19 rating is currently an OHL career-high. Day is tied for sixth among OHL defensemen in goals and ranks eighth among OHL defensemen in shots on goal in 2016-17. He tallied his first career OHL hat trick, including the game-winning goal in overtime, and established a single-game OHL career-high with nine shots on goal on Dec. 4 at Saginaw.
The 6-2, 231-pounder has skated in 235 career OHL games over four seasons (2013-14 - 2016-17) with Mississauga and Windsor, registering 36 goals and 69 assists for 105 points, along with 145 penalty minutes. Day has also skated in 11 career OHL playoff games, recording one goal and three assists for four points. He participated in the CHL Top Prospects Game in 2015-16, and he was selected to the OHL's Second All-Rookie Team in 2013-14. Day was granted exceptional status and allowed to play in the OHL when he was 15 years old, becoming the fourth player (at the time) to be granted exceptional status by Hockey Canada (along with John Tavares, Aaron Ekblad, and Connor McDavid).
Day was selected by the Rangers in the third round, 81st overall, of the 2016 NHL Entry Draft. Born in Leuven, Belgium, he became the first Belgian-born player to be selected in the NHL Entry Draft.
