My husband and I observe Thanksgiving not as a festival (which I believe is the literal meaning of the word eid), but rather as the one time during the year when my entire family comes together to share a meal and spend time with each other.
As a general rule, AbuS and I don't celebrate any american holiday that has a serious religious origin - no christmas, no (saint) valentines day, no easter, no saint patrick's day, no halloween. We do enjoy ourselves on non religious, national holidays like memorial day, fourth of july, labor day and thanksgiving.
An answer from Imam Suhaib Webb, an american convert studying at al Azhar
As a convert to Islam and based on my humble legal training, I agree with the second opinion. Many of us, those of us who have converted to Islam, can use these moments to share the beauty of our faith with our families and loved ones in an non-hostile environment. Perhaps, by giving gifts to our parents we can heal wounds, build relationships and move forward. At the same time, such celebrations are based on the foundations of our faith: honoring one’s parents. Therefore, we should engage such holidays with the intention of fostering noble relations and spreading the beauty of our faith with others.