Chicago (band)- 25 or 6 to 4
"just a reference to the time of day," and that "the song is about writing a song. It's not mystical." The time of day in reference is 3:35 AM (or 3:34 AM), which would then be 25 (or 26) minutes to 4 AM. Lamm was not above perpetuating the mythology of the song, though. In one interview, he referred to the song title as "a cricket score."