Don't take my word for it, read the Bible and don't let some man tell you what to believe if he can't back it up with God's Word, your Soul is at stake.
SUNDAY. The first day of the week. Christians worship the Lord on this day because of the following Bible facts:
BIBLE EVIDENCE THAT EARLY CHRISTIANS WORSHIPPED ON SUNDAY:
1. On the first day Jesus rose from the dead (Mk. 16:9).
2. On the first day Jesus first appeared to his disciples (Mk. 16:9).
3. On the first day Jesus met with the disciples at different places and repeatedly (Mk. 16:9-11; Mt. 28:8-10; Lk. 24:34; Mk. 16:12-13; Jn. 20:19-23).
4. 4. On the first day Jesus blessed the disciples (Jn. 20:19).
5. On the first day Jesus imparted to the disciples the gift of the Holy Spirit (Jn. 20:22).
6. On the first day Jesus commissioned the disciples to preach the gospel to all the world (Jn. 20:21; with Mk. 16:9-15).
7. On the first day Jesus ascended to Heaven, was seated at the right hand of the Father and was made Head of all (Jn. 20:17; Ep. 1:20).
8. On the first day many of the dead saints arose from the grave (Mt. 27:52-53).
9. The first day became the day of joy and rejoicing to the disciples (Jn. 20:20; Lk. 24:41).
10. On the first day the gospel of the risen Christ was first preached (Lk. 24:34).
11. On the first day Jesus explained the Scriptures to the disciples (Lk. 24:27,45).
12. On the first day the purchase of our redemption was completed (Ro. 4:25).
13. On the first day the Holy Spirit descended (Ac. 2:1). Pentecost was on the 50th day after the sabbath following the wave offering (Le. 23:15,16). Thus Pentecost was always on a Sunday.
14. The Christians met to worship on the first day (Ac. 20:6,7; 1 Co. 16:2). Sunday is "the Lord's Day" (Re. 1:10) (D.M. Canright, Seventh-day Adventism Renounced).
Since those days, the vast majority of Christians have always met to worship on the Lord's day. They do this in honor of the resurrection of their Savior. Christ was in the tomb during the sabbath, and rose as the firstborn from the dead on the first day. The sabbath signifies the last day of the old creation (Ge. 2:2). Sunday is the first day of the new creation.
HISTORICAL EVIDENCE THAT EARLY CHRISTIANS WORSHIPED ON SUNDAY.
The Epistle of Barnabas (about A.D. 100). "Wherefore, also we keep the eighth day with joyfulness, the day also on which Jesus rose again from the dead."
The Epistle of Ignatius (about A.D. 107). "Be not deceived with strange doctrines, nor with old fables, which are unprofitable. For if we still live according to the Jewish Law, we acknowledge that we have not received grace ... If, therefore, those who were brought up in the ancient order of things have come to the possession of a new hope, no longer observing the Sabbath, but living in the observance of the Lord's Day, on which also our life has sprung up again by Him and by His death."
Justin Martyr (about A.D. 140). "And on the day called Sunday all who live in cities or in the country gather together in one place, and the memoirs of the apostles or the writings of the prophets are read. ... But Sunday is the day on which we all hold a common assembly, because it is the First day of the week on which God ... made the world; and Jesus Christ our Savior on the same day rose from the dead."
Bardesanes, Edessa (A.D. 180). "On one day the first of the week, we assemble ourselves together."
Clement of Alexandria (A.D. 194). "He, in fulfillment of the precept, according to the gospel, keeps the Lord's Day ... glorifying the Lord's resurrection in himself."
Tertullian (A.D. 200). "We solemnize the day after Saturday in contradiction to those who call this day their sabbath."
Irenaeus (about A.D. 155-202). "The Mystery of the Lord's Resurrection may not be celebrated on any other day than the Lord's Day, and on this alone should we observe the breaking off of the Paschal Feast."
Cyprian (A.D. 250). "The eighth day, that is, the first day after the sabbath, and the Lord's Day."
Apostolic Constitutions (A.D. 250). "On the day of the resurrection of the Lord--that is, the Lord's Day--assemble yourselves together without fail, giving thanks to God and praising Him for those mercies God has bestowed upon you through Christ."
Anatolius (A.D. 270). "Our regard for the Lord's resurrection which took place on the Lord's Day will lead us to celebrate it."
Peter, Bishop of Alexandria (A.D. 306). "But the Lord's Day we celebrate as a day of joy, because on it, he rose again."
BigMack
So If I understand correctly, most Christians have replaced the Sabbath with a "Day of the Lord"?
This brings me to another huge question....aren't we supposed to follow the ten commandments? And if the 10 commandments say that we need to keep a 7th day Sabbath, aren't we disobeying God by not doing it?