"Each son in turn would give". The word "day" perhaps refers to the day when they celebrated the son's birth or it refers to the idea that the sons each took a turn in holding a feast. It must be remembered that Job lives prior to the law of Moses, so his religious practices are different than the Hebrew people after Moses. The events of this book apparently occur about the same time as the life of Abraham. Therefore, this book corresponds more with Genesis 12-50 than the rest of the Old Testament.