Paul's Concern for the Galatians8 But then, indeed, not having known God, ye were in servitude to those not by nature gods, 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? 10 days ye observe, and months, and times, and years! 11 I am afraid of you, lest in vain I did labour toward you. [Young's Literal Translation]
Is it your impression that Paul was referring to Jewish days and months and times? ... learned from the Judaisers?
I would reason these are not but pagan holidays and months and seasons. The Letter to the Galatians was sent too soon after Paul left them for the Judaisers to have succeeded in so much ritual living. These were pagan observances.
All of Galatians 3 is about faith and Grace, and Jesus redeeming us from the sin curse. TO ILLUSTRATE this rescue, this grace bestowed, Paul relates the opposite, the curse of the law he was familiar with, a law and rituals which Judaisers were seeking to inveigle The Grace of God over. Paul then shifts to the pagan ritual behaviors which mark days and months and seasons.
It is interesting, from that standpoint, that Catholicism fell under a similar inveigling by inserting pagan months and days and seasons into the behavioral pattern for believers. It is thought that Rome did this to bring in more converts. I dunno
Yes. Given that throughout Galatians Paul is opposing circumcision and adherence to the Mosaic Law, this would be the most reasonable conclusion. Nowhere else in Galatians does he criticize them for retaining pagan practices. It does not make sense to think that Paul here would suddenly refer to pagan practices and then return to the issue of Jewish practices without again mentioning any pagan practices.
Since those who were pushing the idea that they should be circumcised also called them to follow the Mosaic Law, it would have been part of this law to celebrate the Jewish feasts. Galatians shows that they were attracted to Jewish practices; nothing in it suggest that they were guilty of retaining pagan ones.