Shabbat Shalom to all Sabbath keepers ! From dusk Friday until dusk on Saturday is the Biblical Sabbath - not Sunday. May I respectfully suggest a website created by a man I believe Elohim had me cross paths with during my frustrations of trying to find Biblical truth and not finding it in any mainstream churches - their “dogma” not aligning with what Scripture actually says in many areas.
everlastingkingdom.info is the site - see if it doesn’t resonate as truth in your spirit
Shalom 
@Watchmanonthewall Greetings on this special day. I too spent a lot of time trying to disprove the Sabbath day. After much time researching calendars, etc. I looked in a very old dictionary which plainly stated the obvious! Saturday is the day of rest polluted by the government with their Sunday laws, no car buying, no banking, no alcohol sales, etc. The peace, blessings, and health and real and nothing will change the truth. Peace be with you!