When does it mean in the eight characters?

An hour of 2 hours is divided into three sections, the last two hours are 120 minutes, and 40 minutes is a section. At the end of the period, eight characters are calculated according to this division, and four quarters are arranged according to four quarters. So it's 11: 40 at the beginning, 12: 20 at the middle and 13: 00 at the end.