Sure, no problem, sister, in sha Allah Ta'ala.
https://islamqa.info/en/947
Ibn al-Qayyim, may Allaah have mercy on him, said in Ahkaam Ahl al-Dhimmah: "Congratulating the kuffaar on the rituals that belong only to them is haraam by consensus, as is congratulating them on their festivals and fasts by saying ‘A happy festival to you’ or ‘May you enjoy your festival,’ and so on. If the one who says this has been saved from kufr, it is still forbidden. It is like congratulating someone for prostrating to the cross, or even worse than that. It is as great a sin as congratulating someone for drinking wine, or murdering someone, or having illicit sexual relations, and so on. Many of those who have no respect for their religion fall into this error; they do not realize the offensiveness of their actions. Whoever congratulates a person for his disobedience or bid’ah or kufr exposes himself to the wrath and anger of Allaah."
https://islamqa.info/en/145950
Shaykh al-Islam Ibn Taymiyah (may Allah have mercy on him) said: "Praise be to Allah. It is not permissible for the Muslims to imitate them in any way that is unique to their festivals, whether it be food, clothes, bathing, lighting fires or refraining from usual work or worship, and so on. And it is not permissible to give a feast or to exchange gifts or to sell things that help them to celebrate their festivals, or to let children and others play the games that are played on their festivals, or to adorn oneself or put up decorations. In general, (Muslims) are not allowed to single out the festivals of the kuffaar for any of these rituals or customs. Rather the day of their festivals is just an ordinary day for the Muslims, and they should not single it out for any activity that is part of what the kuffaar do on these days." from al-Fataawa al-Kubra, 2/487; Majmoo‘ al-Fataawa, 25/329
https://islamqa.info/en/45200
And I found this interesting:
http://islamqa.org/hanafi/askimam/77378
Imitation of any kuffar ceremony, holiday, rites, etc. are all impermissible by consensus. And also forbidden by Allah Subhana wa Ta'ala and RasoolAllah salaAllahu alayhi wa salam. I am sure you are familiar with the Hadith "Whoever imitates a people is one of them."
Also, Halloween and "day of the dead" are not the same. And Thanksgiving does have religious and cultural (kuffar) origins.
We (Muslims) have the two celebrations of Eid Alhamdulilah, and we should avoid all else.
Allah knows best.
Note: Be extremely cautious of the Fatwas found online, study yourself and speak to someone knowledgeable and trustworthy on all matters, even if you do find evidence online it is still best to speak to and study by the people of knowledge. I read these carefully before posting as I didn't have in front of me any sources regarding this. But I agree with this view and may Allah guide us to the Truth, sister.