Question 28: What is the ruling on sacrificing an animal at a specific date and time every year? Many people believe that slaughtering on the 27th of Rajab, 6th of Safar, 15th of Shawwaal and 10th of Muharram draw them close to Allaah and is an act of ‘Ibaadah (worship). Are these acts valid? Are they acts of Sunnah or Bid‘ah (innovation in religion) that contradicts Islam and its doer will not be rewarded for them?
Answer: All acts of ‘Ibaadah that draw a Muslim close to Allaah are Tawqeefee (bound by a religious text and not amenable to personal opinion)… read more here.