YaHuWaH created the sun, moon, and stars to mark the beginning and end of the years, not the human race. YaHuWaH's time is maintained by the sun and moon, which are like the two hands on a clock.
Genesis Chapter 1 Verse 14
And the Almighty said, "Let there be lights in the expanse of the heavens to divide the day from the night; and let them be for signs, and for seasons, and for days, and years."
In Exodus, YaHuWaH told Moses when a new year begins:
"And YaHuWaH spoke to Moses and to Aaron in the land of Egypt, saying, ‘This new moon (month) is the beginning of new moons (months) for you; it is the first new moon (month) of the year for you."
When the moon starts a new cycle immediately following the conjunction, it is referred to as the "renewed moon" as mentioned in Exodus Chapter 12. Every month and the new year begin with this rejuvenated moon.
Psalm Chapter 104 Verse 19
"He appointed the moon for appointed times."
Deuteronomy Chapter 16 Verse 1
"Guard the new moon of Abib..."
This is just a brief overview of YaHuWaH’s calendar...
In scripture we are provided with YaHuWaH’s time clock so that we can keep YaHuWaH’s appointed times in line with His calendar. There are 7 appointed times on His calendar each year.