Even in the 1970s my employer (the U.S. Forest Service) insisted that we have our headlights on during any time we were driving. Day or night. I have continued to followed that practice, but in my last 2 vehicles there was a "dayrunner" setting so the lights would be on during the day and come on brighter automatically after dark. What I learned recently is that the dayrunner headlights at night aren't as bright as if you actually turn on the headlights, but they are adequate for most urban driving (where there are streetlights).