2K or Melon's 2K is a page that can be found in the collections, and then from there, click on the Gothic Window.

The page depicts a grey line pattern background, On the top, there is a “Happy New Years 2000!” texture, below that is blue text that says “Please keep this page open, it will refresh once a year for the next thousand years.”, with all of the years from 2000 to 2999, Ones that are colored in black are the ones in the past/current. The ones colored in blue are years that haven't been here yet. You can visit it here. The copyright on the bottom says “It is so”

The song name is Mountain Bells by Lobo Loco. You can download it here.