Note that this clock is in 24-hour time. This clock displays the time in binary form. To read the hours, for example: if the row displays 001011, you read it from right to left, with each cell representing 20, 21, ..., 25, and the 0s and 1s indicate whether you do not need to count them or whether you do, respectively. Therefore 001011 would be 20 (1) + 21 (2) + 23 (8), which is 11, so the hour is 11. It is the same method for calculating the minutes and seconds.