The Feast of Trumpets fell on the first day of the seventh month. This month stood out in the religious year as the Sabbatical month. In this time the three ‘High Holy Days’ typify the conclusion and consummation of the Redemption plan.
The feasts typifies two themes: Divine Judgement, and Mercy. The blowing heralds the beginning of ten days of heavenly trials during which God judges each person with mercy and compassion before executing His judgement on the Day of Attonement.
The Word of God gives no specific reason to observe the feast which is strange.
Some estimate that at least 40 Psalms may have been used in the Feast of Trumpets to celebrate God’s enthronement.
Psalm 47: 5
Scholars calculated the date for Adam’s creation as 23 October 4004 BC. and some rabbis thought it logical to assume that man should be judged on the anniversary of his creation.
Why do some people associate the Feast of Trumpets with the Rapture?
The feast is known as the Wedding of the Messiah and the church is the Bride of Christ
The “Open Door” referring to the gate of the inner court, and to the rapture (Matt 25) is only open on sabbath days and days of the new moon
In Daniel 7:10 we get the image of this judgement.
The books opened are:
The book of the righteous
The book of the wicked
The book of remembrance
A drastic separation between the saved and unsaved happens on the Day of Attonement.