And it came to pass at the time of the going down of the sun, that Joshua commanded, and they took them down off the trees, and cast them into the cave wherein they had been hid, and laid great stones in the cave’s mouth, which remain until this very day. (Joshua 10:27)
In view of the fact that the day was lengthened, there is no reason to doubt that “the going down of the sun,” mentioned in this verse, was on the evening of the remarkably long day.