I think it's a given that Halloween is as near as occultish that an observance can get.
My personal Christian perspective is, that no matter how nice it is to meet up with family, and particularly if they are Christian, the observance of those 'feasts' is somewhat redundant.
We Christians are always aware of the Lord's existence, right? And an acknowledgement of His birth is inherent in that awareness.
The same with Easter...we are aware daily that it is through His suffering, death and resurrection, we live.
And even in thanks giving, we are daily reminded of His kindness and provision which we receive through His mercy and grace, and we thank Him for it, daily.
It seems to me therefore, that these observances are superfluous to a practising Christian.
It could be argued that someone around the periphery of Christianity might be turned fully to the Lord through observing Christmas, Easter or Thanksgiving, but I've never known of it happening in my circle of aquaintences. Indeed, in my upbringing in a strict Catholic environment, the observances of these feasts taught me nothing, except that they were a great time to get presents, and have a pigout.
So, out of my concern for the honour of Jesus, as well as concern for my flesh and blood's welfare and for fear that their participation in these feasts misled them to believe that it made them Christian, I decided some 38 years ago to turn down offers by family to attend their Christmas and Easter get togethers. I explained the reason why I felt I couldn't. They were hurt, disappointed, and nonplussed, and now they leave me out of their plans. Sadly, this hasn't made any impact on their thoughts about Christianity, at least not as yet.
But I felt I had to draw a line for them and me. We still get on very well together, I haven't been ostracised, and I don't feel I've been whacked by God for doing what I have done.
But it's each to their own, everyone has to adjudge what God expects of them in this matter....but for me, answering the OP's question, I can't see a need to observe Christmas, and I don't think the Lord requires me to observe it...