The phrase "25 or 6 to 4" is derived from a song title by the band Chicago, which describes the time of day (25 or 26 minutes until 4 a.m.). The lyrics express the feelings of someone trying to stay awake late at night and reflect on the experiences of life. It symbolizes moments of reflection and the struggle to find clarity in the early hours of the morning.
The phrase itself is a specific reference to time: "25 or 6 to 4" literally indicates the time as 3:35 or 3:34 a.m. The word "to" in this context is used to indicate counting down to a specific time.