18:18, mirror hour

Six in the evening becomes 18:18 on the digital clock. A double mirror hour at the crossing between the day's end and the evening's beginning, when the light outside shifts tone and the city's pace changes with it.

The digits total eighteen here too, and eighteen returns to nine, the number of a finish rather than a start. At 09:09 an ending has to be argued for. At 18:18 the street lights make the case for you. The distinction nine holds is between stopping on purpose and stopping because there is nothing left.