Changing the Sabbath to "Sun-day" on a "Sun" calendar, pretending Jesus was born on the day of the Equinox can hint you a clue on the world you are living in and whom you are really adoring.
Ah yes, the well-known straw man tactic. That will get you far.......not. So let's get at least one thing straight. The day I choose for public or communal worship has never informed my view of who Jesus is. He was, is, and always will be, my Saviour and the Son of God, the second person of the Trinity. That remains a constant irrespective of any personal variables that have zero effect on who He is, including diets, feasts, moons, 'holy days', etc.
As for the rest, by all means prattle on endlessly about the 'beggarly elements' if you insist, but it's really not a subject over which I would go to the stake to defend. This is a classic case of making a mountain out of a molehill. You should take a closer look at Mk. 2:23-27; Gal. 4:8-11; Col. 2:16-17 and Heb. 10:1 - the perfect antidote to all forms of legalism, to which you still appear to be enslaved.