The Most Wonderful Day Of The Year by Glee Cast is in Ab at 120 beats per minute and runs 2:39 across 97 bars. It uses 21 chords — Cm, Eb, Fm7, Bb7, G7, D7, Ab7, G, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? The Most Wonderful Day Of The Year guitar melody tab.