Sister, what Hebrews 4 tells us is that keeping the seventh day of the week with manna as done in Eden is not entering God's "rest" near Israel as God rested in Eden, although they were doing what correct is in Eden with manna. The Sabbath in Israel is correct, but it is not the seventh day of the week in Israel as it was in Eden. In Israel, the Sabbath falls between two days of the week. The point is that the Sabbath in Israel is not a day of the week, established in Eden from morning to morning and not from evening to evening. Israel is keeping the correct Sabbath because remembered it is in the Eden time zone and not because it is in Israel on the seventh day of the week. The first day in Genesis below is from morning to morning, in the special case of the first day from first light to light again in the morning. Evening falls in the middle of the first day dividing the halves that God called "day" and "night", in that order. Each day of the week ends in a "night" in which God has nothing to report from evening to morning because He only creates during the first half of light from morning to evening and stops creating every "night" from evening to morning.
And God said, “Let there be light,” and there was light. God saw that the light was good, and he separated the light from the darkness. God called the light “day,” and the darkness he called “night.” And there was evening, and there was MORNING—the first day. (Genesis 1:3-5 NIV)
United in our hope for the soon return of Jesus, Jorge