2. Day of Rosh Hashanah, the New Year.
The Feast of Trumpets is on Rosh Hashanah, the Jewish civil year which begins on a new moon in the late summer or fall. After the night's prayer service, a special greeting is used: "Ketiva ve-chatima tovah" or "May you be written and sealed for a good year".
Blow the trumpet in the new moon, in the time appointed [full moon], on our solemn feast [sacrifice] days (Psalm 81:3).
3. Day of Creation and Birth of Adam
The Feast of Trumpets is the Jewish celebration of the creation of the world and Adam. Genesis is Beresheet but right to left (teeshereB) is the 1st of Tishri. The month of Tishri is the beginning (creation) and the end with Trumpets (Rapture), Atonement (Second Coming) and Tabernacles (Reign of Jesus Christ).
In the beginning [Alpha b'Tishri] God created the heavens and the earth (Genesis 1:1).
4. Day of the Awakening Blast and Day of Shouting
The Feast of Trumpets is the day of shouting, the resurrection of the dead and the rapture of believers. God rescues those in Christ from imminent danger.
For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first [resurrection]: Then we which are alive and remain shall be caught up [rapture] together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord (1 Thessalonians 4:16-17).