“Then God said, ‘Let there be lights in the firmament of the heavens to divide the day from the night; and let them be for signs and seasons, and for days and years; and let them be for lights in the firmament of the heavens to give light on the earth’; and it was so. Then God made two great lights: the greater light [Sun] to rule the day, and the lesser light [Moon] to rule the night. He made the stars also. God set them in the firmament of the heavens to give light on the earth, 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. So the evening and the morning were the fourth day.” Genesis 1:14-19
God (who is transcendent and apart from time) created time for human beings to use. He created the sun, moon, and stars for time measurements. Morning and evening as a one “solar day” has been in existence since before the creation of Adam and Eve.

12-month/4-season Julian agricultural calendar
Around the founding of the Republic in the 8th century BC, the Roman calendar consisted of ten months beginning in spring with March; winter was left as an unassigned (variable) span of days. Feast days marked the passage of time during the year without regard to any fixed date. Julius Caesar realized that his far-reaching empire could not function according to a timekeeping calendar centrally controlled from Rome by priests and astrologers who defined feast days. In 46 BC Julius Caesar created what we know today as the Julian calendar and ordered its use by everyone in the empire. It consisted of 365 solar days with an annual correction. With minor other corrections from time to time, this calendar served the Eastern world for fifteen centuries. Different calendars by new governments proved confusing after the Roman Empire fell and the Julian calendar was finally changed in 1582 AD by the Roman church to add one leap-day every fourth February. God’s original plan since Creation
has been for the heavens to be “signs and seasons, and for days and years.”
“Walk in wisdom toward those who are outside, redeeming the time. Let your speech always be with grace, seasoned with salt, that you may know how you ought to answer each one.” Colossians 4:5-6
“See then that you walk circumspectly, not as fools but as wise, redeeming the time, because the days are evil.” Ephesians 5:15-16
Time in the Bible is more than just counting solar chronology (from the Greek word for time, CHRONOS) in hours, days, months or years. In the verses above, our life (our walk) is to be continually redeeming the limited, finite time we have. The word redeem means to take full possession of something, to hold it and make it our own. The Greek word KAIROS used in Colossians and Ephesians refers to an opportune time, a “moment” or a “season” such as “harvest time.” God will give us opportunities, KAIROS times, this coming year to make His Name known, to testify of His greatness, to tell others about salvation through His Son, and to serve Him in the local church. May we make the most of every opportunity, no matter what God has in store for us in 2021.