It's broadcast on Tuesdays from 2-3pm, Eastern.
Here is nearly every song ever played on the show compiled into a single playlist*:
And here are links to pages containing embedded playlists of the individual shows:
*NOT PARTICULARLY IMPORTANT DISCLAIMER: The embed appears to be capped at 100 songs; you'll have to click the name of the playlist to hear the rest. Don't like it? Take it up with Spotify. [shrug]