If we want to get technical,
every single holiday we celebrate in modern society originated from pagan roots. Christmas, Easter, Thanksgiving & Halloween. Even birthdays, anniversaries, and funerals generated from pagan rituals. Also, there's numerous insects, animals, and aspects of nature (trees, the sun, the moon, etc) that have been either worshipped and/or believed to be accursed. People will perceive idols of movie stars, popular singers & musicians, billionaires, sports icons, legendary authors, distinguished scientists, famous politicians, etc.
In other words, there isn't much under the sun that's not been corrupted and defiled by carnal man. You'd be hard pressed to find a celebration that doesn't have roots in carnality. Nevertheless, Jesus attended and celebrated at a wedding in Cana and not only turned water into wine, but drank it. So what does that tell us? "To the pure, everything is pure."
We are in this world, not of it. We can't reach the lost if all we do is point our finger at everything and call it demonic like anxiety-ridden fanatics. That is insane. There isn't anything evil of itself, the Living Word explains to us. We make it evil when we take our eyes off the light of God and focus on darkness. This is our Father's world and everything that's in it.
We can celebrate any holiday so long as we do everything as unto the Lord. That is, do all with a joyful heart in Christ Jesus and treat others the way we want to be treated: with love and acceptance, as Jesus treats us.
Of course there are boundaries and we shouldn't give ourselves over to lack of self-control. But instead of freaking out in anxiety and condemning everything because it might have roots is paganism, ask God for wisdom and trust him to guide you in all things.