What is save it for a rainy day jayhawks?

"Save It for a Rainy Day" is a popular song by American rock band The Jayhawks. It was released on their album "Rainy Day Music" in 2003. The song was written by band members Gary Louris and Mark Olson. It is a feel-good tune about making the most of life's good times and saving up for when things get tough. The upbeat melody and catchy lyrics have made it a fan favorite and a staple in The Jayhawks' live performances. "Save It for a Rainy Day" has also been covered by several other artists, including Carrie Underwood.