It Must Be A Happy Day Everywhere

I just walked out the front door of our main building and the delivery guy that was leaving was standing on the step of his van singing. Really loud. Like, yelling with everything he had. When he saw me coming, he smiled, winked, got into the van and drove off, never stopping the loud singing. I didn't recognize the song. It actually sounded like a sad, soul song. But he was pretty happy about it. Whatever the song, that guy put a smile on my face.