The answer is a definite ‘no.’ You are not allowed to break your fast to share family Thanksgiving. I am referring to Ramadan fasting which is the fourth pillar of Islam; hence, no Muslim who can fast should skip it. However, if you are speaking of optional or voluntary fast, you are allowed to break it, and you may make it up later — if you wish.

Allah ordains the believers to honor our parents – even if they are non-Muslims; and yet qualifies it by stating, “if they were to force to associate partners with Allah – do not obey them; however, deal with them excellently in all other worldly matters. Also, follow the path of those who are ever turning to Me in repentance.”(Qur’an: 31: 11)

Almighty Allah knows best.