Galatians is written to Jewish Christians:
4:9
But now, after that ye have known God, or rather are known of God, how turn ye again to the weak and beggarly elements, whereunto ye desire again to be in bondage ?
4:10
Ye observe days, and months, and times, and years.
4:11
I am afraid of you, lest I have bestowed upon you labour in vain.
Philippians 3:1-3.
3:2
Beware of dogs, beware of evil workers, beware of the concision.
3:3
For we are the circumcision, which worship God in the spirit, and rejoice in Christ Jesus, and have no confidence in the flesh.
Just to be clear, do you believe that Paul is calling holy days that the almighty eternal God created, such as the day of atonement, "weak and beggarly elements"?
Hardly! Verse 8 says, "Formerly, when you did not know God, you were slaves to those who by nature are not Gods." When was the last time you heard of any Jewish folks who "did not know God?"....at least in New Testament times!
4:10 Ye observe days, and months, and times, and years.
Pagans observed the above.....have you ever heard of the "Venerable Day of the Sun?" There is no mention of Sabbaths or Feast Days in this scripture! Pagans did indeed have "special days".....and months....and years.
What translation is this?
Here's the NAS:
Gal 4:9 But now that you have come to know God, or rather to be known by God, how is it that you turn back again to the weak and worthless elemental things, to which you desire to be enslaved all over again?
YLT:
Gal 4:9 and now, having known God--and rather being known by God--how turn ye again unto the weak and poor elements to which anew ye desire to be in servitude?
I think it was in high school where I first learned that Romans/Greeks were the ones who worshipped elements: earth, wind, fire, and water was it?
Paul was, again, preaching to Gentiles - Hellenistic Gentiles to be precise.