After looking at the lunar sabbath calendar in every which way possible I found that here is no way a seven day period fits into a 29-30 day month period! It cannot happen! You have days missing and not fitting. God instituted that the sun also to take care of days so my guess is our Sunday through Saturday is what God intended with Saturday being the sabbath.
In the book of Jubilees it says:
And God appointed the sun to be a great sign on the earth for days and for Sabbath's and for months and for feasts and for years and for Sabbath's of years and for jubilees and for all seasons of the years. .
But the month goes by the moon. Just by looking at the moon they were able to tell what week of the month it was but to tell the time of the year took looking at where the sun was. I believe that God is able to do anything and since He ordained that Israel keep His sabbath I believe God is still in control! I once heard a testimony from an ex-satanist who said that they hated the 7th day Adventists the most because they were keeping the sabbath that's why he became a 7th day Adventist when he accepted Jesus. The word says that satan has always tried to change times and seasons and he has managed to keep Christians from worshiping on Saturdays!