The world mission society church of God is Zion where the feasts are celebrated

The world mission society church of God[WMSCOG] is Zion where the feasts are celebrated.
Christ Ahnsahnghong nim and Heavenly Mother rebuilt the Zion [the Church of God].
And the world mission society church of God believes in Christ Ahnsahnghong nim and Heavenly Mother and preaches the gospel of the new covenant established in Zion

The prophecy in the book of Psalms, " The blessing of eternal life will be given in Zion, " and the prophecy in the book of Isaiah, "The forgiveness of sins will be given in Zion where the feasts are celebrated," are all fulfilled by the Passover which Jesus kept with His disciples.
To receive the blessing of eternal life, we must eat Jesus'flesh and drink His blood (John 6:53~54). Jesus said that the Passover bread and wine are His flesh and blood, through which He promised us the forgiveness of sins and eternal life, which people who are destined to die want to most.

(Mt 26:17~28) On the first day of the Feast of Unleavened Bread, the disciples came to Jesus and asked, "Where do you want us to make preparations for you to eat the Passover?" 
He replied, "Go into the city to a certain man and tell him, 'The Teacher says: My appointed time is near. I am going to celebrate the Passover with my disciples at your house.' " 
So the disciples did as Jesus had directed them and prepared the Passover. 
While they were eating, Jesus took bread, gave thanks and broke it, and gave it to his disciples, saying, "Take and eat; this is my body." 
Then he took the cup, gave thanks and offered it to them, saying, "Drink from it, all of you. 
This is my blood of the covenant, which is poured out for many for the forgiveness of sins.

The greatest gift that Jesus gave to the church after His ascension was the "Holy Spirit." By the power of the Holy Spirit, a great revival occurred in the early Church. And the Holy Spirit was given to the saints who prayed earnestly from the Day of Ascension and the kept the Day of Pentecost.

(Ac 2:1~4) When the day of Pentecost came, they were all together in one place. 
Suddenly a sound like the blowing of a violent wind came from heaven and filled the whole house where they were sitting. 
They saw what seemed to be tongues of fire that separated and came to rest on each of them. 
All of them were filled with the Holy Spirit and began to speak in other tongues as the Spirit enabled them. 

Also, Jesus promised people the water of life, keeping the feats of Tabernacles. He granted the water of life, which is desperately needed for thirsty souls, through the feast called the Feast of Tabernacles.

(Jn 7:2)  But when the Jewish Feast of Tabernacles was near,

(Jn 7:37~39) On the last and greatest day of the Feast, Jesus stood and said in a loud voice, "If anyone is thirsty, let him come to me and drink. 
Whoever believes in me, as the Scripture has said, streams of living water will flow from within him." 
By this he meant the Spirit, whom those who believed in him were later to receive. Up to that time the Spirit had not been given, since Jesus had not yet been glorified. 

Moreover Jesus kept the weekly feast, the Sabbath day, according to His custom, and set the example for us to realize God who created the heavens and the earth and everythings in them (Lev 23:2~3; Ex 31:13; Eze 20:21).

(Lk 4:16) He went to Nazareth, where he had been brought up, and on the Sabbath day he went into the synagogue, as was his custom. And he stood up to read. 

Jesus grated the blessings which are absolutely needed to the saints such as the forgiveness of sins, eternal life, the Holy Spirit, the water of life and so on, through the feast of the new covenant.
Christ, who came as the spiritual King David, established the spiritual Zion where the feast of the new covenant are celebrated.
This spiritual Zion established by Jesus 2000 years ago is the very Church of God ( 1Co 1:2; 11:22; Gal 1:13).