“Come to me, all you that are weary and are carrying heavy burdens, and I will give you rest. Take my yoke upon you, and learn from me; for I am gentle and humble in heart, and you will find rest for your souls. For my yoke is easy, and my burden is light.” (Matthew 11:28-30)
Under the new covenant, the sabbath isn't about a day of the week, but a person. The weekly sabbath observance in the Mosaic covenant was a shadow law pointing to Christ.
Matthew 11:28 is citing Exodus 33:14
Exo_33:14 And he said, My presence shall go with thee, and
I will give thee rest.
The Sabbath Commandment (Exodus 20:8-11) was and is never about a single day of the week. Read the Commandment, it is about the whole week, all 7 days and more importantly the LORD of it:
Exo 20:8 Remember
the sabbath day, to keep it holy.
Exo 20:9
Six days shalt thou labour, and do all thy work:
Exo 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:
Exo 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.
The Sabbath from Creation is always rooted in the Creator, JEHOVAH Elohiym.
Look at vs 10, "of the LORD thy God",
Look at vs 11, "the LORD", "the LORD".
"Remember"
whose sabbath day? The LORD's (Genesis 2:1-3). The sabbath is "of" the LORD. God rested.
The Law of God (Exodus 20:1-17) is
never "shadow", but always "light":
Pro_6:23 For
the commandment is a lamp; and
the law is light; and reproofs of instruction are the way of life:
Isa_8:20 To
the law and to
the testimony: if they speak not according to
this word, it is because there is no
light in them.
You are confused on what Colossians 2 says.
Again, the Mosaic (old) 'covenant' is not God's "my ("His") covenant". It is God's, not Moses's.
Again, you are eisigetically reading into the texts that which is not present, at all.