Today when I left work, it was still light out. This is about a month plus a week since winter solstice. If the days shortened at the same rate they're now lengthening, probably the last time it was light when I left work was a month and a week before solstice. So I guess I drive home in the dark about two and a half months of the year.
It was dark by the time I got home, but the point is that whole drive was not in darkness.