The weekly Sabbath is the only day as a unique day not based on seasons, human historical events or the movement of the astronomical bodies.
Six days shalt thou labour, and do all thy work:
But the seventh day is the sabbath of the LORD thy God:
in it thou shalt not do any work,....
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.
Exodus 20:8-11
And I saw another angel fly in the midst of heaven,
having the everlasting gospel to preach unto them that dwell on the earth,
Saying with a loud voice,.......
and worship him that made heaven, and earth, and the sea, and the fountains of waters.
Revelation 14:6,7
It exists for one purpose:
Remember the sabbath day, to keep it holy. Six days shalt thou labour, and do all thy work:
But the seventh day is the sabbath of the LORD thy God:
in it thou shalt not do any work,....
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.
Exodus 20:8-11
And I saw another angel fly in the midst of heaven,
having the everlasting gospel to preach unto them that dwell on the earth,
Saying with a loud voice,.......
and worship him that made heaven, and earth, and the sea, and the fountains of waters.
Revelation 14:6,7