Yes it does
A Sabbath-day is a day kept holy as the Sabbath.
the sabbath is a holy day of rest
To keep the ordinances and commandments of God in keeping pure and spotless on sabbath day.
The question answers itself: not keeping the Sabbath day holy is a sin.
There is no such commandment. The reason for this notion is a tradition that started with the commandment "Keep Holy the Sabbath Day." It was interpreted to mean that people should not labor gainfully on the Sabbath. Sunday is, however, not the Sabbath. The fact that Sunday is the holy day of the week is a Christian tradition.
Remember the Sabbath day to keep it holy.
The Seventh Day.
The Sabbath is the holy day of rest. Most Christians now celebrate the Sabbath on Sunday, to commemorate Jesus' resurrection. The Sabbath is to be observed once a week.
As it says in the bible, The seventh day was to be the sabbath, the holy day. Not every day is holy, just the sabbath, the day of rest, for that's when God finished his creation of the Earth.
it is a holy day
Yes. Exodus 20:8, " Remember the Sabbath day and keep it holy" (Wikipedia)
Sabbath