29th Annual Holiday Tree Exhibition December 1 – December 31 Vote for your favorite!A Holiday tradition now in its 29th year returns to Irving Arts Center as the galleries are transformed into a wonderland of spectacularly decorated Christmas Trees and student artwork.. For virtual viewing and voting, visit Irving Arts Center’s Facebook or Instagram pages. You can also vote in-person via QR Code when you view the trees during normal gallery hours (Tuesday-Saturday, 12-5PM).