ASHORTWORK
Biblical Understanding based on the Record of Scripture
YHVH created the sun and the moon and set them in the heavens, in part, to show when to observe His Festivals. The date listed on this calendar for the start of the 1st month and the 7th month is based on the first projected sighting, after sunset, of the renewing of the light of the moon.
1 John 3:22, 23 NKJV
And whatever we ask we receive from Him, because we keep His commandments and do those things that are pleasing i His sight.
And this is His commandment: that we should believe on the name (reputation, record) of His Son Jesus Christ and love one another, as He gave us commandment.