Have known this for a while now. Most churches do not teach this because they follow the pagan holidays and Sunday Worship, instead of God's Holy Days and Sabbaths which point directly to Yeshua, his first coming, His death, burial and resurrection and His second coming. This is must for those who do not yet understand.

https://youtu.be/y9qXXdJ66...

I'm having trouble reconciling the Sabbath. We are dealing with the Julian vs Gregorian Calendars, which are off by 13 days from each other. Then there is the idea of the 13-month calendar, which throws further shade on it. So, in reality, we really don't know what day of the week today, tomorrow, or the next day really is.