We see that throughout the ages Christians who upheld the Sabbath (Saturday) as God's true day of rest were persecuted by the authorities. A fifth column movement infiltrated Jewish Christianity bringing in pagan heresies. They abandoned the Sabbath for Sunday, under the Council of Nicea in 365 AD. Armstrong's ministry began in 1933, lasting 62 years before its destruction in 1995 when leaders dismantled the church. Armstrong was founder for 53 years.
The SUN is the centre of the tree on the kabbalah and is called tiphereth. It's number is 666 according to Hermetics. Sunday is the "first" day of the week. Whereas the Sabbath is the "seventh" day. Lucifer dwells in the first heaven so his day of worship is on the first day of the week. He sits on "kether" in the qlipoth. Lucifer has a throne on the earth until Jesus Christ returns. God's throne is in the seventh heaven, corresponding to Kether on the tree of life, and represented by the seventh day. Those who follow God observe the seventh day acknowledge the true Lord of the seventh heaven. Those who follow Lucifer (whether deliberate or through deception) follow his day of worship, the first day of the week representing his earthly throne in the first heaven.