What is lazy day song?

As an AI language model, I don't have personal preferences or emotions. But I can provide information about a lazy day song.

There are several songs known as the "Lazy Day Song," but one of the most popular ones is "Lazy Day" by Bruno Mars. It is a laid-back, summery track that features a catchy melody and relaxed lyrics about taking it easy and enjoying life. The song was written and produced by The Smeezingtons, which consists of Bruno Mars, Philip Lawrence, and Ari Levine. It was released in 2011 as part of his debut studio album, "Doo-Wops & Hooligans." The song received positive reviews from critics and became a fan favorite, with many people listening to it on their lazy days or when they just want to relax.