Берешит 1:13 Комментарий: Rabbeinu Bahya

And there was evening and there was morning, the third day. During these three days, evening and morning were mentioned, but there were no lights that would obligate the evening and morning. Because the setting of the sun is the evening and its rising is the morning, however, in these three days, evening and morning were mentioned not with regard to the light, but with regard to the celestial sphere, which turns and revolves, because every part of the firmament, when it rises, is its morning, and when it sets, it is its evening. But from the fourth day and onwards, when the luminaries were created, evening and morning were mentioned with regard to the light.