In what situation should you use your headlights during the day?

Using your headlights during the day is particularly important in rainy or foggy conditions because it increases your vehicle's visibility to other drivers. In low visibility conditions, such as rain or fog, headlights help illuminate the road ahead and make your car more noticeable to others, thereby enhancing safety on the road. This is crucial since rain and fog can greatly decrease visibility, making it difficult for other drivers to see you, and for you to see road signs, obstacles, or other vehicles.

While headlights can be used at other times, such as at night or in specific situations on highways, the emphasis on using them in inclement weather is primarily about safety and visibility. Sunny weather typically provides sufficient light for driving without needing headlights, and headlights are required to be on at night for safety.