<P> On the venerable Day of the Sun let the magistrates and people residing in cities rest, and let all workshops be closed . In the country, however, persons engaged in agriculture may freely and lawfully continue their pursuits; because it often happens that another day is not so suitable for grain - sowing or vine - planting; lest by neglecting the proper moment for such operations the bounty of heaven should be lost . </P> <P> Despite the official adoption of Sunday as a day of rest by Constantine, the seven - day week and the nundial cycle continued to be used side - by - side until at least the Calendar of 354 and probably later . </P> <P> In 363, Canon 29 of the Council of Laodicea prohibited observance of the Jewish Sabbath (Saturday), and encouraged Christians to work on the Saturday and rest on the Lord's Day (Sunday). The fact that the canon had to be issued at all is an indication that adoption of Constantine's decree of 321 was still not universal, not even among Christians . It also indicates that Jews were observing the Sabbath on the Saturday . </P> <P> Some Christian denominations, called "Sabbatarians", observe a Saturday Sabbath . The name "Sabbatarian" has also been claimed by Christians, especially Protestants, who believe Sunday must be observed with just the sort of rigorous abstinence from work associated with "Shabbat". More recently, Christians in the Seventh - day Adventist, Seventh Day Baptist, and Church of God (Seventh - Day) denominations, as well as many Messianic Jews, have revived the practice of abstaining from work and gathering for worship on Saturdays . </P>

Who declared sunday as holiday for the first time in india