Spotify cheese is a alternative word for the "cakeday icon" which shows up next to the username of person of reddit when they have their anniversary or "cakeday".
Bob: I almost forgot to make a meme for my Spotifycheese day. Ted: Oh damn, you almost missed out on that free karma
The holy holiday on July 10th that celebrates all uncircumcised men and their dick cheese. People usually spend this day making their own dick cheese in honor of the homies
Jake: Yo Sean’s birthday is on national dick cheese day!
Jake #2: No way that’s tomorrow I’m so excited nigga.