It says THEIR REMAINS and then explains how we enter into that rest by ceasing from our own works in the next verse. Do you believe we do this only on Saturday ? So God only wants you to pick up your cross and cease from your own works on a Saturday ?
By the way which calender are you following ?
You know there are many Sabbaths.
Acts 16:13 point to a specific day. In Acts 13:14 "Sabbaton" plural could mean that the day was both a seventh day Sabbath and a Feast Day Sabbath.
Weekly Sabbath - 7th day of week rest
In the Textus Receptus, "Sabbaton" plural also occurs in 1 Cor. 16:2, referring to a "week" of seven days.
Monthly Sabbath - Seventh Month
Lev 23:24 Speak to the children of Israel, saying: 'In the seventh month, on the first day of the month, you shall have a rest (sabbathism), a memorial of blowing of trumpets, a holy convocation.
The Day of Atonement
Lev 23:27 Also the tenth day of this seventh month shall be the Day of Atonement. It shall be a holy convocation for you; ... 31 You shall do no manner of work; it shall be a statute forever throughout your generations in all your dwellings. 32 It shall be to you a sabbath of solemn rest, and you shall afflict your souls; on the ninth day of the month at evening, from evening to evening, you shall celebrate your sabbath."
Lev 16:29 This shall be a statute forever for you: In the seventh month, on the tenth day of the month, you shall afflict your souls, and do no work at all, whether a native of your own country or a stranger who dwells among you. 30 For on that day the priest shall make atonement for you, 31 It is a sabbath of solemn rest for you, and you shall afflict your souls. It is a statute forever. NB: Like the weekly sabbath the Day of Atonement was - a complete day of rest, Lev 23:31 - breach punishable by death, Lev 23:30 - statute forever, Lev 16:31, 23:31.
Week of weeks Sabbaths - 7 weeks between Pentecost and First Fruits
Lev 23:15 And you shall count for yourselves from the day after the Sabbath, from the day that you brought the sheaf of the wave offering:
seven Sabbaths shall be completed. 16 Count fifty days to the day after the seventh Sabbath; then you shall offer a new grain offering to the LORD.
Deut 16:9 You shall count seven weeks for yourself; begin to count the seven weeks from the time you begin to put the sickle to the grain. 10 Then you shall keep the Feast of Weeks to the LORD your God ...
Weeks of months Sabbaths- 7 months - sacred calendar per year
Yearly Sabbaths - 7th year rest for the land
Years of Sabbath Years
Lev 25:8 And you shall count seven sabbaths of years for yourself, seven times seven years; and the time of the seven sabbaths of years shall be to you forty-nine years. 10 And you shall consecrate the fiftieth year, ...
Years of 1000 year Sabbath = Millennium which is the rest which this scriptural verse is speaking of.