As we can see in the article below, the original 6 days of creation were 28 hours long. Can anyone provide any more supporting info on this item? Maybe someone here has info from hebrew seforim that are not in english online.
Google searches are not helping.
Rabbi Eliyahu of Izmir in his commentary to Chumash (Parashas Ki Sisa) quotes a Midrash that states that initially, G-d created not seven 24-hour days, but six 28-hours days.
Source: https://www.kosher.com/article/having-shabbat-on-our-minds-throughout-the-week-409