Wake Me Up When September Ends by Green Day is in G at 104 beats per minute and runs 4:39 across 67 bars. It uses 8 chords — G5, C, Cm, Em, Bm, D, E5, Dsus. 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? Wake Me Up When September Ends guitar melody tab.