Point [1]: The [Def. art.] Sabbath, being the [Def. art.] 7th Day, is "made" [Creation] for "the [Def. art.] man", which "man" is anthropos, and in Ecclesiastes 12:13-14, etc is "Adam" and thus all mankind in him:
Mark 2:27 And he said unto them, The sabbath was made for ["the"] man, and not ["the"] man for the sabbath: [* the definite article "the" is in the Greek manuscripts]
Mark 2:27 Greek with Strong's Numbers and Robinson's Morphological Analysis Codes - καιG2532 CONJ ελεγενG3004 V-IAI-3S αυτοιςG846 P-DPM τοG3588 T-NSN σαββατονG4521 N-NSN διαG1223 PREP τονG3588 T-ASM ανθρωπονG444 N-ASM εγενετοG1096 V-2ADI-3S ουχG3756 PRT-N οG3588 T-NSM ανθρωποςG444 N-NSM διαG1223 PREP τοG3588 T-ASN σαββατονG4521 N-ASN
Point [2]: God/Jesus "made" the Earth Round [Spherical]:
Isaiah 40:22 It is he that sitteth upon the circle of the earth, and the inhabitants thereof are as grasshoppers; that stretcheth out the heavens as a curtain, and spreadeth them out as a tent to dwell in:
Point [3]: The 'day' [24 hrs] begins with "evening", followed by "morning", unto the next "evening":
Genesis 1:15 And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day.
See also Genesis 1:8, 13,19, 23,31; Exodus 16:8; Daniel 8:26; etc
John 11:9 Jesus answered, Are there not twelve hours in the day? If any man walk in the day, he stumbleth not, because he seeth the light of this world.
Point 4: "Evening" truly begins when the "sun" sets:
Genesis 28:11 And he lighted upon a certain place, and tarried there all night, because the sun was set; and he took of the stones of that place, and put them for his pillows, and lay down in that place to sleep.
Mark 1:32 And at even, when the sun did set, they brought unto him all that were diseased, and them that were possessed with devils.
Point 5: "Morning" is a "sun" rise:
Judges 9:33 And it shall be, that in the morning, as soon as the sun is up, thou shalt rise early, and set upon the city: and, behold, when he and the people that is with him come out against thee, then mayest thou do to them as thou shalt find occasion.
Point 6: God kept the First Sabbath, which He Made for the man:
Genesis 2:1 Thus the heavens and the earth were finished, and all the host of them.
Genesis 2:2 And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made.
Genesis 2:3 And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.
Exodus 20:8 Remember the sabbath day, to keep it holy.
Exodus 20:9 Six days shalt thou labour, and do all thy work:
Exodus 20:10 But the seventh day [is] the sabbath of the LORD thy God: [in it] thou shalt not do any work, thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy stranger that [is] within thy gates:
Exodus 20:11 For [in] six days the LORD made heaven and earth, the sea, and all that in them [is], and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it.
Leviticus 23:3 Six days shall work be done: but the seventh day is the sabbath of rest, an holy convocation; ye shall do no work therein: it is the sabbath of the LORD in all your dwellings.
Deuteronomy 5:12 Keep the sabbath day to sanctify it, as the LORD thy God hath commanded thee.
Deuteronomy 5:13 Six days thou shalt labour, and do all thy work:
Deuteronomy 5:14 But the seventh day [is] the sabbath of the LORD thy God: [in it] thou shalt not do any work, thou, nor thy son, nor thy daughter, nor thy manservant, nor thy maidservant, nor thine ox, nor thine ***, nor any of thy cattle, nor thy stranger that [is] within thy gates; that thy manservant and thy maidservant may rest as well as thou.
Deuteronomy 5:15 And remember that thou wast a servant in the land of Egypt, and [that] the LORD thy God brought thee out thence through a mighty hand and by a stretched out arm: therefore the LORD thy God commanded thee to keep the sabbath day.
Hebrews 4:4 For he spake in a certain place of the seventh day on this wise, And God did rest the seventh day from all his works.
Hebrews 4:5 And in this place again, If they shall enter into my rest.
Hebrews 4:6 Seeing therefore it remaineth that some must enter therein, and they to whom it was first preached entered not in because of unbelief:
Hebrews 4:7 Again, he limiteth a certain day, saying in David, To day, after so long a time; as it is said, To day if ye will hear his voice, harden not your hearts.
Hebrews 4:8 For if Jesus had given them rest, then would he not afterward have spoken of another day.
Hebrews 4:9 There remaineth therefore a rest to the people of God.
Hebrews 4:10 For he that is entered into his rest, he also hath ceased from his own works, as God [did] from his.
Hebrews 4:11 Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief.
Point 7: Mankind was to multiply and "fill the earth":
Genesis 1:27 So God created man in his [own] image, in the image of God created he him; male and female created he them.
Genesis 1:28 And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth.
Point 8: Mankind was eventually "scatter[ed]" over the face of the earth after the Tower of Babel and the Global Flood of Noah:
Genesis 11:8 So the LORD scattered them abroad from thence upon the face of all the earth: and they left off to build the city.
Genesis 11:9 Therefore is the name of it called Babel; because the LORD did there confound the language of all the earth: and from thence did the LORD scatter them abroad upon the face of all the earth.
Point 9: The 7th Day the Sabbath of the LORD thy God, has not been lost in history, for God has preserved it, even unto a "thousand generations" [Deuteronomy 7:9; 1 Chronicles 16:15; Psalms 105:8], and Jesus Himself kept the right day in the right manner [John 15:10], for He sinned not [2 Corinthians 5:21, etc], and sin is the transgression of the Law [1 John 3:4], and many others after Him, even throughout history [as some historical sources have already been cited, I will leave it at those for now]:
Luke 23:56 And they returned, and prepared spices and ointments; and rested the sabbath day according to the commandment.
Acts 13:14 But when they departed from Perga, they came to Antioch in Pisidia, and went into the synagogue on the sabbath day, and sat down.
Acts 13:27 For they that dwell at Jerusalem, and their rulers, because they knew him not, nor yet the voices of the prophets which are read every sabbath day, they have fulfilled them in condemning him.
Acts 13:42 And when the Jews were gone out of the synagogue, the Gentiles besought that these words might be preached to them the next sabbath.
Acts 13:44 And the next sabbath day came almost the whole city together to hear the word of God.
Acts 15:21 For Moses of old time hath in every city them that preach him, being read in the synagogues every sabbath day.
Acts 16:13 And on the sabbath we went out of the city by a river side, where prayer was wont to be made; and we sat down, and spake unto the women which resorted thither.
Acts 17:2 And Paul, as his manner was, went in unto them, and three sabbath days reasoned with them out of the scriptures,
Acts 18:4 And he reasoned in the synagogue every sabbath, and persuaded the Jews and the Greeks.
Revelation 1:10 I was in the Spirit on the Lord's day, and heard behind me a great voice, as of a trumpet,
etc, etc. Therefore, the 7th Day the Sabbath of the LORD thy God has come down to all of us even after all these years.
Since the world/earth is round, the days come and go as the "sun" 'rises' or 'sets', and comes to each one of us where we are upon the earth, since we are all now scattered over its whole surface. "The Sabbath was made for [the] man", and thus so made to be a blessing to the individuals which keep it unto God, yet it will come relative to the individual persons in the respective locations upon the spheroid earth. For instance, if 1 person is in United States, and 2 person is in India, the Sabbath comes to each person in their respective positions, because the earth is round, and thus the "day" begins for one of the persons earlier than that of the other.
We can know from the scattering of the dispora of the Jews, and also of the Christians from Jerusalem, that the 7th Day Sabbath continued to be kept in those countries wherein they came unto according to the standard weeks time [7 days], and thus spread from Jerusalem westward [towards England, etc] and eastward [towards China, etc]. The 7th Day [the Sabbath of the LORD thy God] that comes to Jerusalem is still the same as then. The Sunday [first [day] of the week] that comes to Rome is the same as it was then. The two days are still next to each other, even as they are in the United States, wherein many Christians have come to.