40 Days is the debut full-length album from Canadian folk trio The Wailin' Jennys. The lineup of the group at the time was Ruth Moody, Nicky Mehta, and Cara Luft. This was the last recording to feature Luft, who left the group the following year. Although the title, 40 Days appears as a line in the song "Something to Hold Onto", and traditionally has religious significance it was chosen for another reason. The title is actually the number of days it took the Jennys to record and refine the album and is a tribute to the experiences encountered during that time.