To check out the original Dutch article, click here!
1) Nowhere in the Old or New Testament, the Sabbath has been abolished or replaced (by Sunday).
In other words: There is nothing wrong with keeping the Sabbath!
Keeping the Sabbath was declared forbidden on the council of Laodicea (canon 29):
“Christians must not judaize by resting on the Sabbath, but must work on that day, rather honouring the Lord’s Day; and, if they can, resting then as Christians. But if any shall be found to be judaizers, let them be anathema [excommunicated] from Christ.”  (Read also my article “Anathemas in Church Councils” on why I am against anathemas)
2) The Sabbath is included in the list of the ten commandments.
The fourth commandment:
“Remember the Sabbath day, to keep it holy. Six days you shall labor and do all your work, but the seventh day is the Sabbath of the Lord your God.In it you shall do no work: you, nor your son, nor your daughter, nor your male servant, nor your female servant, nor your cattle, nor your stranger who is within your gates. For in six days the Lord made the heavens and the earth, the sea, and all that is in them, and rested the seventh day. Therefore the Lord blessed the Sabbath day and hallowed it.”
– Exodus 20:8-11
Most Christians, in my opinion, rightfully believe that we should certainly obey the Ten Commandments. Who are we to remove the fourth commandment?
3) On the day of the Sabbat God put a unique blessing.
Read the latest verse again and Genesis 2:2-3:
“And on the seventh day God ended His work which He had done, and He rested on the seventh day from all His work which He had done. Then God blessed the seventh day and sanctified it, because in it He rested from all His work which God had created and made.”
– Genesis 2:2-3
Notice that the blessing does not rest on the first day (Sunday). If we choose to replace God’s Saturday with the Sunday, we arrive one day late. Like the Dutch Willibrordvertaling (the Roman-Catholic bible translation) indicates in the foot note on verse 2: “‘Sabbath’ is related to a verb which means ‘to rest’. It is a divine establishment and that day must be reserved for God.”
4) The Sabbath is (not was) a shadow.
“So let no one judge you in food or in drink, or regarding a festival or a new moon or sabbaths, which are a shadow of things to come, but the substance is of Christ.” 
– Colossians 2:16-17
Notice the word “so”. This word points to the fact that verse 16 and 17 are a conclusion of the previous part. In the previous part Paul discussed that Jesus forgave our transgressions. Therefore, it might be that, in the typical style of Paul, Paul calls for sobriety (also read my article entitled “wine“) and for keeping the Jewish feasts. I believe that the Dutch “Herziene Statenvertaling” is correct in entiteling this section: “The foolishness of human regulations”… But because the translators of that Bible are probably sunday keepers, they have, in my opinion, put the title in the wrong place. The part from verse 6 till verse 8 is probably talking about Pagan feasts, and verse 18 to 23 confirms this. Of course this “philosophy and empty deceit, according to the tradition of men” (verse 8b) “things which perish with the using—according to the commandments and doctrines of men” (verse 22b). So this cannot possibly talk about the Sabbath, since this feast is not created by men but by God (Genesis 2:2, Leviticus 23:3).
5) Keeping the Sabbath might be a good preparation for the millenial kingdom. 🙂
According to one interpretation of Isaiah 66:22-23 the Sabbath will not vanish, but she will be celebrated, together with moon feasts, during the millenial reign. These verses are, in my opinion, quite ambiguous. They can also mean that within the time span of 1 week, – and therefore logically also within the time span of 1 month – the millenial kingdom will be founded. ‘“For as the new heavens and the new earth which I will make shall remain before Me,” says the Lord, “so shall your descendants and your name remain. And it shall come to pass that from one New Moon to another,and from one Sabbath to another, all flesh shall come to worship before Me,” says the Lord“‘. So maybe we will congregate there on every Saturday (day of Sabbath) and celebrate God’s moon feasts (the meaning of moon feasts, for present-day Christians, will be investigated soon).
Click here to check out the booklet that convinced me of keeping the Sabbath (free | Dutch).
Click here to check out English books on other subjects.
Read also “Sabbath as The Day of Rest and Hope“.
Source: Anilrochester (keep-calm-o-matic) (I am not a member of the Seventh Day Adventist church or denomination)
 Added “[Excommunicated]” | Original: “Quod non oportet Christianos Judaizere et otiare in Sabbato, sed operari in eodem die. Preferentes autem in veneratione Dominicum diem si vacare voluerint, ut Christiani hoc faciat; quod si reperti fuerint Judaizare Anathema sint a Christo.” (translation: Henry Percival; Nicene and Post-Nicene Fathers, Second Series, Vol. 14; original text: Laodicea)
 Many (Dutch) translations add the word “merely” (“which are [merely] a shadow of things to come “). This word is not in the Greek and might have to do with prejudices of the translators.
All Scripture passages are taken from the New King James Version.