Exodus 16:21 And they gathered it every morning, every man according to his eating: and when the sun waxed hot, it melted.
Thus, the manna obviously fell in the darkness, and in the morning, there it was on the ground. What The Lord did at night to create the manna, no one knows for sure, but the following morning, all we know is that there was bread, ready for the people. In the Genesis account God began His creative work in darkness, and thus the dark part of the day is very important to God, and should be to us as well.
Genesis 1:1 In the beginning God created the heaven and the earth. 2 And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters. 3 And God said, let there be light: and there was light. 4 And God saw the light, that it was good: and God divided the light from the darkness. 5 And God called the light Day, and the darkness He called Night. And the evening and the morning were the first day.
And ever since that time, the “dark” part of the day cycle has played an important role, not only in God’s creative work, but also in the laws pertaining to the keeping of the Sabbath. Sanctification includes God’s creative work in our hearts, for it is the same power that was exercised in Genesis, which now works in the heart of the believer. Thus, God specified when the Sabbath was to be kept, as the memorial of His creative power.
Exodus 31:13 Speak thou also unto the children of Israel, saying, verily my sabbaths you shall keep: for it is a sign between me and you, throughout your generations; that you may know that I am the Lord that doth sanctify you.
May The Lord add His blessing to the study of His word. God bless!