Because God commands it, it is the 4th commandment. The reasons for keeping Shabbat (sabbath) are to affirm the faith God created the world and redeemed the Jews from Egypt.
It is important to realize that the Sabbath was not just for the Jews, but for all mankind. The Sabbath was established at creation (Genesis 2:1-3). Jesus called all to worship God, and to keep his commandments; it is a universal calling (Revelation 14:6,7).
Some people are workaholics who believe resting is "wrong and bad".Answer:Sabbath days are established by religions for their followers or believers, As a consequence those who are not members of that religion would not observe that specific sabbath day. Some people belong to no religion, have no religious affiliation or belong to philosophies that have no sabbath days. In that case they would not have to observe any sabbath day.
Sunday
Christianity and in that a group called 'Seventh Day Adventist' which the sabbath is their holy day which is Saturday. They do not work / party from friday night to saturday night as a time of rest and reflection to God about the good he has done in their lives
Probably, although there was controversy about healing a man on the Sabbath when he was alive.
I don't think it is.
Jews observe the Sabbath from Friday night at sundown, until Saturday night at sundown.
During the Holocaust, Oscar Schindler saved the lives of the Jewish people who worked for him in his factory. For Jews, the Sabbath (called "Shabbat" in Hebrew or "Shabbos" in Yiddish) is from Sundown Friday night to Sundown Saturday night. The sabbath is the day of rest, and Schindler allowed his Jewish workers to observe their sabbath.
The "true Sabbath", if one wishes to observe it as it was original set out in the Torah, starts Friday sundown and ends Saturday sundown.
Jesus observed 1,700 Sabbaths.
because he only preyed on weak knights.
The people (Jews) probably worked on Sunday. The Jewish people worship on the Sabbath which was Saturday. Actually the Sabbath started at 6:00 P.M. on Friday and ended at 6:00 P. M. on Saturday. If there was feast days in certain months the people would observe them and mostly no work was done.
Jews all over the world, including Russia, observe the Sabbath from Friday sundown to Saturday night.