Galatians 4:9-11
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?
Ye observe days, and months, and times, and years.
I am afraid of you, lest I have bestowed upon you labour in vain.
Or, if you'd rather...
Galatians 4:21-26
Tell me, ye that desire to be under the law, do ye not hear the law? For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.
But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.
Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar. For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.
But Jerusalem which is above is free, which is the mother of us all.
Christ did not give us a Spirit of bondage (to days, and months, and times, and years), but a Spirit of freedom.
[Galatians 4:8] Howbeit then, when ye knew not God, ye did service unto them which by nature are no gods.
Sometimes it helps to go back a little to see the context. Paul is speaking of "elements of the world" (verse 3)....idols, false gods.... the Galatians had worshiped prior to their conversion. Let us not forget, Paul was chosen as an Apostle to the Gentiles, not to the circumcised as had been the original twelve, As such, Paul evangelized many folks who had previously worshiped idols and pagan things. As Paul explained in his first letter to the Corinthian Church, idol worship is the worship of demons [I Corinthians 10:19-20].
The entities which had caused so much grief to the Galatians were evil spirits....not the Divine Laws of Our Lord. It would be very difficult for Paul, as a Lawyer and a well educated Pharisee who studied God's Laws under Gamaliel [Acts 22:3] to call the laws of God....beggarly! Yes....pagans observed days, months, seasons and years (verse 10)....but not God's Feasts and Holidays.....a big difference!
Clearly you feel that "days, months, times and years" are referring to God's holy days. They're not and here's why:
1. The greek word used to refer to the Lord's holy days is heorte. This word isn't used in these verses.
2. Do you really believe that Paul would blaspheme the written word, the only written words they had, of the Lord our God by calling the holy days he created "weak and beggarly elements"?
I happen to think there's a better explanation. Sin is the bondage we are in. In Galatians 4, the people Paul was writing to were former pagans who observed "days, months and years" for a multitude of "gods". I think later that Jews began to influence these new Christians by saying that they HAD to adhere to all the manmade Jewish rules, laws, traditions and regulations that the Jewish religion had established over the centuries or else they didn't really know God.