Genesis 1 8
God called the expanse, “sky.” So there was evening, and then the morning, making day two.
Compare with other 3 random translations
NCV Genesis 1:8God named the air “sky.” Evening passed, and morning came. This was the second day.
CSB Genesis 1:8God called the expanse “sky.” Evening came and then morning: the second day.
KJV Genesis 1:8And God called the firmament Heaven. And the evening and the morning were the second day.