The 4th day of creation and the 4th epistle Galatians

Genesis 1:14 (KJV) 14 And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:

Genesis 1:15 (KJV) 15 And let them be for lights in the firmament of the heaven to give light upon the earth: and it was so.

Genesis 1:16 (KJV) 16 And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: [he made] the stars also.

Genesis 1:17 (KJV) 17 And God set them in the firmament of the heaven to give light upon the earth,

Genesis 1:18 (KJV) 18 And to rule over the day and over the night, and to divide the light from the darkness: and God saw that [it was] good.

Genesis 1:19 (KJV) 19 And the evening and the morning were the fourth day.

Galatians 4:10 (KJV) 10 Ye observe days, and months, and times, and years.