Catholics teach that people who provide a necessary social service can work on the sabbath. This means policemen, military soldiers, phone operators, and even grocery clerks can have a special compensation granted to them to work on this day. For those who are not providing an essential service, they should not work. Could some one be forced to work? Of course. This answer given assumes that one has basic civil rights to freely choose what they do on a Sunday (e.g. they don't live as a slave or under a Dictatorship without rights).
The Sabbath was made for man, not man for the Sabbath.
The purpose of the Sabbath, according to the statement "the Sabbath was made for man," is to benefit and provide rest for humanity.
For Puritans, the Sabbath was a day of strict religious observance and rest. They believed in keeping the Sabbath holy by attending church services, refraining from work, and engaging in activities that focused on worship and spiritual matters. The Sabbath was seen as a time to connect with God, reflect on one's faith, and spend time with family in a pious manner.
Jesus said that in reply to some criticism about Him doing certain activities on the sabbath. The idea, as I understand it, is that the sabbath should be of benefit to humans (as in having a day of rest, from hard work), and not something harmful (as in not wanting to save somebody because it happens to be a sabbath and you are "supposed to rest").
Here are a couple of example, from the Torah. Exodus 20.8-20.11: Remember the sabbath day and keep it holy. Six days you shall labor and do all your work, but the seventh day is a sabbath of the LORD your God: you shall not do any work--you, your son or daughter, your male or female slave, or your cattle, or the stranger who is within your settlement. For in six days the LORD made the heaven and earth and seas, and all that is in them, and He rested on the seventh day; therefore the LORD blessed the sabbath day and hallowed it. Exodus 31.14-31.17 You shall keep the sabbath, for it is holy for you. He who profanes it shall be put to death: whoever does work on it, that person shall be cut off from among his kin. Six days may work be done, but on the seventh day there shall be a sabbath of complete rest, holy to the LORD; whoever does work on the sabbath day shall be put to death. The Israelite people shall keep the sabbath, observing the sabbath throughout the ages as a covenant for all time: it shall be a sign for all time between Me and the people of Israel. For in six days the LORD made heaven and earth, and on the seven day He ceased from work and was refreshed.
No, it isn't lawful to fight on the Sabbath, let alone work then.
Saturday is the Sabbath and the Jewish day of rest, no work is allowed to be done on the Sabbath.
The Jews accused Jesus of violating the Sabbath's "no work" law.
The Old Testament stated to remember the sabbath and keep it holy. Jesus said that someone could work on the sabbath if they are doing good. Examples might be volunteering for charity, or helping orphans and widows, or feeding the poor.
In the Time of Jesus, ALL Jews did not work on the Sabbath because it was (and still is) the Jewish day of rest. Today ALL Orthodox and many non-Orthodox Jews will not work on the Sabbath. The Fourth Commandment is to keep the Sabbath Holy by not performing labors.
According to the narrative in the Gospels, the Pharisees were bothered by Jesus healing (or performing work) on the Sabbath. Current Jewish Law, however, specifies that saving lives is a higher-order command than observing the Sabbath.
"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..." (Ex.20:8-10).