And יהוה spoke to Mosheh, saying, “Speak to the children of Yisra’ĕl, and say to them, ‘The appointed times of יהוה, which you are to proclaim as set-apart gatherings, My appointed times, are these: ‘Six days work is done, but the seventh day is a Sabbath of rest, a set-apart gathering. You do no work, it is a Sabbath to יהוה in all your dwellings. ‘These are the appointed times of יהוה, set-apart gatherings which you are to proclaim at their appointed times.
Wayyiqra (Leviticus) 23:1‭-‬4 TS2009

This is why Hebrews have Saturday as their Sabbath. The reason most Judeo-christians keep Sabbath on Sunday and not Saturday as their God instructed is because the Roman Emperor Constantine outlawed the 7th day Sabbath and mandated the Sunday worship day, to divert worship toward the Roman Sun god Sol Invictus. The Catholic Church at the time just gave in instead of standing up for their beliefs. There is a growing movement world wide of believers returning to 7th day Sabbath day of rest established by Yehovah.