The context in which the word yom is used in Genesis 1:5-2:2, describing each day as “the evening and the morning,” makes it quite clear that the author of Genesis meant 24-hour periods. The references to “evening” and “morning” make no sense unless they refer to a literal 24-hour day.
Mazingira ambayo neno yom limetumika katika Mwanzo 1:5-2:2, likielezea kila siku kama "jioni na asubuhi," linaiweka wazi kabisa kwamba mwandishi wa Mwanzo alimaanisha vipindi vya saa 24. Rejeleo la "jioni" na "asubuhi" hazileti maana isipokuwa zirejelee masaa 24 halisi ya siku.