I forget where I read this exactly, but while some religious Jewish people would not work on Saturday I don't think this was the rule. Christians seem to have no religious issue that I know of today and plenty of secular Jewish people also still work on the weekend. Anyhow, I can't find the source right now.

https://www.pbs.org/livelyhood/workday/weekend/8hourday.html

"In 1890, when the government first tracked workers' hours, the average workweek for full-time manufacturing employees was 100 hours and 102 hours for building tradesmen."

https://en.wikipedia.org/wiki/Working_time "Before collective bargaining and worker protection laws, there was a financial incentive for a company to maximize the return on expensive machinery by having long hours. Records indicate that work schedules as long as twelve to sixteen hours per day, six to seven days per week were practiced in some industrial sites" (citation needed though)

https://ourworldindata.org/working-hours

https://eh.net/encyclopedia/hours-of-work-in-u-s-history/