Celebrating Any Yearly Festival Other than Two Eids

At first, we will see the following three narrations -

• Our beloved Allah's Messenger Muhammad (sallallaahu ’alayhi wa sallam) issued a stern warning: "Whoever imitates a nation is one of them!"
  - Abu Da'oud's Sunan
  
• "Narrated by Anas bin malik (rd) when Allah's Messenger (sallallahu alaihi wa sallam) came (to madina), they have two days for festival. He (sallallahu alaihi wa sallam) asked what is the significance of these two days. They said - during the time of jahiliyya we celebrated on these two days (Nowruz & Mehregan). Allah's Messenger (sallallahu alaihi wa sallam) said - Allah has given you better than these- Eid ul Fitr & Eid ul Adha"
  - Abu Da'oud's Sunan
  
• Narrated from 'Abdullaah bin 'Amr (rd) who said, "Whoever resides in the land of A'ajm [Non-arab (here, it meant non-muslims)] and enjoys/joins their (kuffar's) Nowruz (new year festival/1st day of spring), or Mehregan (harvest festival/1st day of Autumn) (neeruujhahum wa mihirjaanahum); and imitates them, (even) he(/she) remains (indulged in) similar (activities) till death; (then) on the resurrection ('Qiyaamah) day, his(/her) judgement ('Hashr) will be with them (non-muslims)." 
  [Bayha'qee; according to the verification of Sk Mu'hammad Ibraaheem its Sanad (chain) is Saheeh]
  
• Allah's Messenger (sallallahu alaihi wa sallam)  said, "I am disavowed from every Muslim who resides amongst the backs of the polytheists (Mushrikin). Their fires should not be seen." - Abu dawood's Sunan

Ibn al-Qayyim (may Allaah have mercy on him) said: it is not permissible for the Muslims to attend the festivals of the mushrikeen, according to the consensus of the scholars whose words carry weight. The fuqaha’ who follow the four schools of thought have stated this clearly in their books… Al-Bayhaqi narrated with a saheeh isnaad from ‘Umar ibn al-Khattaab that he said: “Do not enter upon the mushrikeen in their churches on the day of their festival, for divine wrath is descending upon them.” And ‘Umar also said: “Avoid the enemies of Allaah on their festivals.” Al-Bayhaqi narrated with a jayyid isnaad from ‘Abd-Allaah ibn ‘Amr that he said: (Same as 3rd narration) (Ahkaam Ahl al-Dhimmah, 1/723-724).