The idea of a legally protected weekly day of rest has become so normal in modern society that few people stop to ask where it came from, who shaped it, or what principles guided its development. Yet behind modern labour laws lies more than simple concern for worker welfare. The historical record reveals that international institutions connected to the United Nations and its predecessor systems helped establish a global framework for synchronized weekly rest, and throughout much of that process Sunday observance stood at the center of discussion.

The chief body responsible for this development has been the International Labour Office (ILO), originally formed through the Treaty of Versailles after the First World War and later integrated into the United Nations system. The ILO has repeatedly promoted the principle that workers should receive a regular weekly rest period, ideally shared simultaneously across society.

Two major conventions formed the backbone of this policy. The first was ILO Convention No. 14 of 1921, concerning industrial workers. It established that workers should receive at least twenty-four consecutive hours of rest every seven days and stated that this rest should, “wherever possible,” coincide with the traditions and customs of the country. The second was Convention No. 106 of 1957, which extended similar principles to office and commercial workers. Article 6 of Convention 106 stated that the weekly rest period should “wherever possible” coincide with the established day of rest of the country or district.

On the surface, these conventions appear religiously neutral. Sunday is not named explicitly in the conventions themselves. Yet the historical documents surrounding their drafting tell a different story. The roots stretch back to the 1919 Treaty of Versailles, whose labour provisions declared that nations should adopt “a weekly rest of at least twenty-four hours, which should include Sunday wherever practicable.”

When preparations were made for the ILO’s 1921 conference, governments received questionnaires explaining the objectives of the proposed weekly rest convention. One explanatory section openly stated that “Sunday should be adopted in principle,” while allowances could be made for non-Christian nations. The report also emphasized the desirability of having the great majority of workers resting on the same day together. The principle of synchronized rest was viewed as socially beneficial and practically necessary.

The responses from member nations reveal how dominant Sunday observance already was in international thinking. References to Sunday appeared hundreds of times throughout the report, while no other day of rest received comparable attention. Many countries already possessed laws restricting labour or trade on Sunday before the convention was finalized.

A substantial majority of responding nations supported Sunday as the normal weekly rest day. Some nations referred to it explicitly as “the Lord’s Day.” Others supported limited exemptions for minorities but still insisted that public commercial activity on Sunday should generally cease. Even where exceptions were permitted for Jews observing Saturday or Muslims observing Friday, Sunday remained the central standard around which labour policy revolved.

The conventions did not have sufficient provisions to protect religious minorities. Convention 106 stated that the customs of minorities should be respected “as far as possible.” That phrase is significant. It did not establish an inalienable protection of conscience but rather a conditional accommodation that could be overridden whenever governments considered it impractical. Article 13 further allowed suspension of the convention during war or national emergencies.

For groups such as Seventh-day Adventist Church members, these developments were not merely theoretical. Adventist publications in the 1920s recorded how Sunday labour restrictions led to the persecution of seventh-day Sabbath-keeping bakers in Australia and New Zealand. Since they already chose to not work on Saturday in harmony with the Bible and the life of Jesus, Sunday restrictions effectively deprived them of the ability to operate their businesses.

Before Convention 106 was adopted in 1957, another questionnaire was circulated among member states. Of the nations that specified a weekly day of rest, nearly all identified Sunday. Iran stood almost alone in advocating Friday rest instead. Some governments even referred explicitly to worship and spiritual edification as reasons for selecting the weekly rest day.

The ILO openly acknowledged philosophical alignment with the papal encyclical Rerum Novarum, issued by Pope Leo XIII. That encyclical defended Sunday cessation from labour as a religious obligation. While the ILO framed weekly rest primarily in social and economic language, the moral assumptions underpinning many of its policies were clearly shaped by longstanding Christian traditions surrounding Sunday.

Modern ILO publications continue to reflect this heritage. A 2015 ILO factsheet explained that national weekly rest laws are usually organized around local customs, typically Friday, Saturday, or Sunday depending on religious tradition. A 2019 ILO guide similarly described Sunday and Saturday as the normal weekend in Western nations, while Friday filled that role in many Arab countries.

Under the framework of the United Nations Sustainable Development Goals, the ILO has also connected weekly rest with the concept of “decent work.” Sustainable Development Goal 8.5 calls for “full and productive employment and decent work for all.” In a 2018 ILO report titled Ensuring Decent Working Time for the Future, the organization emphasized the social value of synchronized weekly rest. The report stated that simultaneous rest allows workers to enjoy family and social life together and noted concerns from European organizations about the erosion of Sunday rest.

Supporters of these conventions argue that they simply protect workers from exploitation and strengthen family life. Certainly, the idea of regular rest carries obvious social and health benefits. Yet the historical evidence demonstrates that Sunday observance has consistently occupied a privileged position within international labour discussions. The language of “tradition,” “custom,” and “simultaneous rest” often functioned as indirect references to established religious practice.

This history raises broader questions about liberty of conscience. When governments legislate synchronized rest days tied to dominant religious traditions, minority groups inevitably face pressure to conform. Even where exemptions exist, they are often conditional and limited. For those who believe rest and religious observance belong solely within the realm of conscience rather than civil compulsion, it is obvious that these international labor rest laws amount to disguised religious legislation.

The story of the ILO’s weekly rest conventions illustrates how religious customs, social policy, international governance, and economic regulation have gradually merged together under the language of humanitarian concern. Whilst it is promoted as  wise social policy the trajectory towards removing religious liberty or liberty of conscience is unmistakable. The international legal framework has been constructed that will no longer just be synchronised rest, but enforced synchronised false worship (Revelation 13:12,15) that will require Sunday worship which has no basis in the Bible.

Summary of an Extract from the book ‘Captive Bride’, chapter 6. The book with citations for this article is available in a free PDF on libertyherald.org