The melody of Best Day Of My Life by American Authors runs 437 notes across 67 bars, 2:52 long in D at 100 beats per minute. The tab sits low on the neck, mostly under the fourth fret, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? Best Day Of My Life chords and lyrics.