Genesis 1:8 in the King James Version
And God called the firmament Heaven. And the evening and the morning were the second day.
Context
7 God made the expanse, and divided the waters which were under the expanse from the waters which were above the expanse; and it was so.
8 God called the expanse “sky”. There was evening and there was morning, a second day.
9 God said, “Let the waters under the sky be gathered together to one place, and let the dry land appear;” and it was so.