The article goes on to provide an excellent overview of this important feast of the Lord. God established times and seasons naturally and spiritually speaking. One of the ways He marks both is through feasts. Most refer to these feasts as Jewish feasts but in truth Ezekiel 44:24 reveals that the feasts actually are His feasts.
Why even the book of Zechariah foretold that there would be others who'd recognize the purpose of the Jewish feasts. It was a time to seek the Lord (emphasis/underlines added).
Rosh Hashanah is called the head of the year and is the start of the 10 Days of Awe wherein inward retrospection is encouraged. It's a personal assessment and an opportunity to determine if there is anything God wants you to repent of and or anyone whom you need to address to make things right. USA Today, "It marks the beginning of the 10 “Days of Awe,” in which Jews focus their attentions on repentance and reflection leading up to Yom Kippur, the Day of Atonement, considered to be holiest day of the Jewish year."
The beauty of this is, every feast pointed in someway to Jesus Christ and God's plan for mankind. Why we find this concept of introspection in scriptures like 1 Corinthians 11:28 where is says, "But let a man examine himself..." It encourages a discipline not borne of the the law of "have to" but rather motivated by love and "want to."
Zechariah 8:18 - 9:1
Then the word of the Lord of hosts came to me, saying, “Thus says the Lord of hosts:
‘The fast of the fourth month, The fast of the fifth,
The fast of the seventh, And the fast of the tenth,
Shall be joy and gladness and cheerful feasts
For the house of Judah. Therefore love truth and peace.’
“Thus says the Lord of hosts: ‘Peoples shall yet come,
Inhabitants of many cities; The inhabitants of one city shall go to another, saying,
“Let us continue to go and pray before the Lord, And seek the Lord of hosts.
I myself will go also.” Yes, many peoples and strong nations
Shall come to seek the Lord of hosts in Jerusalem, And to pray before the Lord.’
“Thus says the Lord of hosts: ‘In those days ten men from every language of the nations shall grasp the sleeve of a Jewish man, saying, “Let us go with you, for we have heard that God is with you.” ’ ”
So what's God saying for this new year?