Get ready to feel positive with "행복했던 날들이었다 days gone by" by DAY6. With a 103 BPM and 4 time signature, the rhythms flow in C minor. Spanning 3 minutes and 25 seconds, "행복했던 날들이었다 days gone by" radiates high energy from start to finish. Let the positive vibes of this track carry you away.