Woman of Substance - AShT-ChYL MY YMTsA
The Abary/Hebrew word for Shabat means to cease, to cease from work, to rest.  It is related to the Abary/Hebrew word for seven or shabah.
B'rsyth 2:2-3 And in the seventh day Yahuah completed His work which He had done, and He rested on the seventh day from all His work which He had made.  And Yahuah esteemed the seventh day and made it Qadush, because on it He rested from all His work which Yahuah in creating made.
Shamut 16:23 And he said to them, "This is what Yahuah has said, Tomorrow is a rest, a Shabat Qadush to Yahuah.  That which y ou bake, bake and that which you cook, cook.  And lay up or yourselves all that is left over, to keep it until morning."
Shamut 20:8-11 Remember the Shabat day, to "Qadash" it.  Six day you labor, and shall do all your work, but the seventh day is a Shabat of Yahuah your Almighty.  You do not do any 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 Yahuah made the heavens and the earth, the sea and all that is in them, and rested the seventh day. Therefore Yahuah esteemed the Shabat day and make it Qadush.
Shamut 31:13-14  Speak also to the children of Yasharal, saying: `Surely My Shabatut you shall keep, for it [is] a sign between Me and you throughout your generations, that [you] may know that I [am] YHUH who makes you qadash. And you shall guard the Shabat, for it is Qadush to you.  Everyone who profanes it shall certainly be put to death, for anyone who does work on it that being shall be cut off from among his people.  Six days work is done, and on the sevent is a Shabat of rest, Qadush to Yahuah.  Everyone doing work on the Shabat day shall certainly be put to death.  And the children of Yashar'al shall guard the Shabat to perform the Shabat day throughtout their generations as an everlating covenant.  Between Me and the children of Yashar'al it is a sign forever.  For in six days Yahuah made the heavens and the earth, and on the sevent day He rested and was refreshed.
YashaYahu 58:13 "If you keep your feet from breaking the Shabat and from doing as you please on my set-apart day, if you call the Shabat a delight and Yahuah's Qadush day honorable, and if you honor it by not going your own way and not doing as you please or speaking idle words,
Shamut 35:3 Do not kindle a fire in any of your dwellings on the Shabat day."
YashaYahu 56:2 exalted is the man who does this, the man who holds it fast, who keeps the Shabat without desecrating it, and keeps his hand from doing any evil."
YashaYahu 56:4 For this is what Yahuah says: "To the eunuchs who keep my Shabat, who choose what pleases me and hold fast to my covenant--
YararmYahu 17:21 This is what Yahuah says: Be careful not to carry a load on the Shabat day or bring it through the gates of Yarushalam.
YaramYahu 17:22 Do not bring a load out of your houses or do any work on the Shabat, but keep the Shabat day qadush, as I commanded your forefathers.
Uyqra 23:3 "'There are six days when you may work, but the seventh day is a Shabat of rest, a day of solemn assembly. You are not to do any work; wherever you live, it is a Shabat to Yahuah.
D'Barym 5:13-14 Six days you shall labor and do all your work,  but the seventh day is a Shabat to Yahuah your Almighty. On it you shall not do any work, neither you, nor your son or daughter, nor your manservant or maidservant, nor your ox, your donkey or any of your animals, nor the alien within your gates, so that your manservant and maidservant may rest, as you do.
Abarym 4:4 For somewhere he has spoken about the seventh day in these words: "And on the seventh day Yahuah rested from all his work."
Abarym 4:8-9  For if Yahusha had given them rest, Yahuah would not have spoken later about another day.There remains, then, a Shabat-rest for the people of Yahuah; for anyone who enters Yahuah's rest also rests from his own work, just as Yahuah did from his.
This statement is justified by the word for "rest" which enters at this point, signifies guarding the Shabat. The Shabat points back to Yahuah's original rest, and marks the ideal rest - the rest of perfect adjustment of all things to Yahuah, such as ensued upon the completion of his creative work, when he pronounced all things good. This falls in with the ground-thought of the letter, the restoration of all things to Yahuah.
The Shabat is a sign between YHUH and His people forever. And not just Yasharal, but for all who enjoin themselves unto the favor and promises of Yasharal by accepting Yahusha the HaMashyach.
Yashayahu 56:3 Do not let the son of the foreigner Who has joined himself to YHUH Speak, saying, "YHUH has utterly separated me from His people"; Nor let the eunuch say, "Here I am, a dry tree." 4 For thus says YHUH: "To the eunuchs who keep My Shabatut, And choose what pleases Me, And hold fast My covenant, 5 Even to them I will give in My house And within My walls a place and a name Better than that of sons and daughters; I will give them an everlasting name That shall not be cut off. 6 "Also the sons of the foreigner Who join themselves to YHUH, to serve Him, And to love the name of YHUH, to be His servants--Everyone who keeps from defiling the Shabat, And holds fast My covenant--
We know that not just Yasharal was to keep the Shabat, but EVERYONE.
Yashayahu 66:22 "For as the new heavens and the new earth Which I will make shall remain before Me," says YHUH, "So shall your descendants and your name remain. 23 And it shall come to pass [That] from one Head of the Month to another, And from one Shabat to another, All flesh shall come to worship before Me," says YHUH.
Guard the Shabat - Yahuah commands and rightly-rules that we are to keep, guard, Qadush His Shabat.  That we are not to kindle a fire, that we are not to cause strife, that we are not to carry a burden, that we are to keep the day qadush, that we are not to profane the Shabat, that the Shabat is a sign of His covenant with His people. 
MAN has decided to change the Shabat to the first day of the week because:
  1. Yahusha rose from the dead on the first day of the week (Math. 28:1-7; Mark 16:2, 9; Luke 24:1Yahuchanan 20:1).
  2. Yahusha appeared inside the room to the eleven disciples eight days after the first day of the week.
  3. The Ruach came on Shabu'at, the first day of the week (Uyaqra. 23:16; Ma'asy 2:1).
  4. The Believers also heard a message from Shaul on the first day of the week (Ma'asy 20:7). Note: the reference is until midnight which is not the Yahudym method of measuring days, but the Roman system.
  5. Shaul instructed the assemblies to put aside contributions on the first day of the week
    (1 Cor. 16:2).
And still others try and point out that Shaul spoke to the people saying that they shouldn't allow others to judge them on what day they they worship.  (Shaul was not even a taught one, and he was not Yahuah, and therefore has no authority to change anything)
While all these statements are true, that does not take away from the fact that Yahuah said to guard His Shabat and to keep it Qadush.
Let us reason. The first day of the week has always, since the beginning of time, constituted a day of WORK.  Can you worship, can you praise, YES.  However this day was not esteemed or made qadush. 
We have to remember the circumstances surrounding Yahusha's death.  His body had to be hurridly laid in the tomb because bodies were not allowed to remain hanging/impaled once Shabat began. 
Yahuah rested on creating the entire universe on the Shabat day.  Why then would HE work to resurrect HIS Son on the very day that He made Qadush?  That means that HE would have had to overcome death to bring HIS son to life on the Shabat. WORK
The concept of "collecting" constitutes work.  Let us take up the collection on the day after Shabat, because then we will not be WORKING!  So we can go around from house to house from assembly to assembly freely and not profaning the Shabat. 
Shabu'at was a Qadush Muad time of Yahuah.  Not only were the Believers still observing SHABAT, they were also observing ALL of Yahuah's appointed feasts.  Why forget about the Shabath but still observe HIS feasts?  Doesn't make sense in the scheme of things, especially when HIS appointed feast times were secondary to HIS 7th day Shabat.
Just like the appointed feast times foreshadow HIS return, HIS SHABAT (Yahuah's not man's) foreshadow HIS return.  His Shabat prepares us for that ultimate day of rest, that eternal day of rest.
People say that there is a mystery surrounding the Shabat of Yahuah.  There is no mystery to those that are HIS.  If we cannot observe HIS Shabat now, why should we take for granted that we will enter into HIS eternal Shabat when HE comes back?
Scripture tells us to guard HIS Shabat and that it is a sign of HIS EVERLASTING covenant between HIM and HIS people.  We can and should worship HIM everyday of our lives, but it is only HIS Shabat that HE specifically said was HIS set-apart day that HE esteemed.  HE didn't esteem the first day, HE didn't esteem the second day of the week, HE didn't esteem the third day, fourth day, or fifth day or sixth day.  HE esteemed HIS Shabat.  Sunset the 6th day to sunset the 7th day constitutes the 7th day according to Yahuah's calendar. 
In most every language known to man, with a HUGE exception to English, the word for the seventh day is similar to the Abry/Hebrew Word Shabat. Sabbado in Spanish.  Sabatos in Italian.  Sabbados in Greek. The day was rendered Saturn's day (saturday) by the romans and adopted by the English language and continued through to today by everyone who doesn't know better.
We know that the word "lord" has its etymology in the word Ba'al.  So then wouldn't the true meaning of sun's day would be Ba'al's day if we call it the Lord's Day?
Man esteemed sun'sday be it out of ignorance or a hardening of heart. 
Who will you serve? 
As for me and my house, we are serving and forever will serve Yahuah!
Shabat Shalum!
How to keep the Shabat qadush