Ruth, I don’t blame you for being confused. Adventist belief at the core is not wrong depending on what one means by core. Prophecy is real. Its historically verifiable, but that does not mean we have understood everything correctly. I mentioned to brother Bart regarding Daniel 9 and Revelation 2 recently to show that God has spoken in scripture regarding things to come. This is impossible for some to believe regardless of the soundness of the evidence because there is no God in their view. Thus, all the rationalizing.
Genesis 1 can be understood, biblically speaking to mean a week of epochs in which God created instead of 24 hour periolds. YOM or day in Hebrew is often used to be an epoch of time Gen. 2:4
4 This is the account of the heavens and the earth, in the day they were created, when the Lord God made the earth and the heavens.
We keep every seventh day, weekly ‘24 hour day’ in commemoration of this seventh epoch of God’s finished Creation. We as believers are to cease from our works, and rest spiritually as God did in Creation, Hebrews Four.
Sabbath is still a memorial of Creation and now a memorial of rest in Grace as well.
The essential key iin this view is that Gen 2:1-3 ( the seventh-day ) has no ‘evening and morning’ closure. The 7th Epoch of is still here and now-- Nothing New has been created in the last 10 000 years for example. This is one way to approach the text.
Nearly 1800 years ago, Augustine noted this, and indicated that the seven days of Gen 1-2a stood for great epochs of time and God’s creation. Note: Augustine saw this before there was ‘need’ to reconcile geology with theology.
The reason why there is no ‘evening and morning’ refrain for the seventh-day is because the seventh-day epoch hasn’t ended. God began resting and has continued ever since. Nature is now superintended by the digital programs of Epigenetics and God rarely intervenes.
In John 5:16-18 Jesus defended His healing on the Sabbath by saying that His Father is always at work to this very day, and I too , am working” (verse 17) The key here is "to this very day.’ Translation: in spite of this being the Epoch of Sabbath Rest God still works, therefore do not criticize me for working on the Weekly memorial of The Epochal Sabbath Rest.
Jesus is saying that he is honoring the Sabbath just as his Father does. “To this very day” God has worked EVEN during this Sabbath Period of history (“up to this very day”). God has stopped creating during our time but not stopped working. Thus each day of the week may also commemorate the actually time periods of the actual creation “week.” As stated–‘Yom’ in many texts of the Hebrew Bible can mean periods of time. Gen. 2:4.
In the Hebrew, days 1-5 have no definite article (ha), while days 6 and 7 do have the definite article, because they are the most importance to us - we were created on the 6th and now rest on the 7th. These are about us, there (the) is used.
This probably opens more questions, but there are good answers to them