The naming of "Day" and "Night" is a significant event recorded in the creation narrative of the Book of Genesis. According to Genesis 1:3-5 in the Berean Standard Bible , God initiates the creation process by commanding light into existence: "And God said, 'Let there be light,' and there was light. God saw that the light was good, and He separated the light from the darkness. God called the light 'day,' and the darkness He called 'night.' And there was evening, and there was morning—the first day."

This passage highlights several key theological and cosmological themes. Firstly, the act of naming by God signifies authority and dominion. In the ancient Near Eastern context, naming was often associated with ownership and control. By naming the light "Day" and the darkness "Night," God establishes His sovereignty over time and the created order. This divine prerogative underscores the belief in God's ultimate authority over the universe.

Secondly, the separation of light from darkness and the subsequent naming introduces the concept of order from chaos. The initial state of creation is described as "formless and void" (Genesis 1:2), and the introduction of light marks the beginning of structure and organization. The distinction between day and night sets the foundation for the rhythm of time, which is further developed in the creation narrative with the establishment of celestial bodies to govern the day and night (Genesis 1:14-18).

Theologically, the naming of day and night also reflects the moral dichotomy often found in biblical literature, where light is associated with goodness, truth, and divine presence, while darkness is frequently linked with evil, ignorance, and separation from God. This symbolic use of light and darkness is pervasive throughout Scripture, reinforcing the moral order that God establishes in creation.

Furthermore, the cycle of day and night serves as a reminder of God's provision and faithfulness. The regular alternation of light and darkness is a testament to the reliability of God's creation, providing a framework for human activity and rest. This cyclical pattern is later enshrined in the Sabbath commandment, where the rhythm of work and rest mirrors the divine pattern of creation (Exodus 20:8-11).

In summary, the naming of day and night in Genesis is a foundational event that establishes God's authority, introduces order into creation, and sets the stage for the moral and temporal framework within which humanity operates. It is a testament to the power and wisdom of God, who brings light into darkness and order into chaos.