Creation Sabbath moon days feast

Hello I see in the old testament moon days and Sabbath and feast days. Does the bible designate these as separate? Or as part of a unit. I understand these days to be forever and that in the restoration of all things in the millennium they will be kept. By Torah alone can these days be kept outside of Jerusalem for Jews. Because for a time there has been no temple. I am a believer I don't know wether to call my self Jewish or gentile. In heritage I am mixed that isn't my concern what I am ethnically here. I only care for truth. The Christian church has confused by the hands of there farthers I do believe in Messiah I do believe he was Yehoshuah. But for my mind to see clearly I need help, not to refute Messiah that is not my question I will see truth in what I asked you. If you can help kind regards Jonnithan

Shalom!

Thank you for writing.

Every holy day is independent from the other.