It's close, but 3:33, 5:00, and 4:20 are the most popular. Every time is represented, but 6:31AM, 8:41AM, and 9:49AM have only one song.
Entire list: https://pudding.cool/projects/clocks/assets/songs.csv
Entire list: https://pudding.cool/projects/clocks/assets/songs.csv
Seems strange they would not use a 24 hour clock to associate the songs, and the songs not specifically being about before or after noon could be associated with both.
Indeed, it would feel weird to play 2 Minutes to Midnight two minutes before noon.