What is the ruling on eating the meat of an animal slaughtered with the intention of seeking blessings during the olive harvest season, and is one who eats from it considered sinful, given that the slaughtering is done according to Islamic law?

Muslims are not permitted to innovate holidays and celebrate them, except for those legislated by Allah, which are Eid al-Fitr and Eid al-Adha. The proof for this is that when the Prophet, peace and blessings be upon him, arrived in Medina and saw that the Ansar had two days on which they would play, he said: "Indeed, Allah has substituted for you two days better than them: the Day of Sacrifice (Eid al-Adha) and the Day of Breaking the Fast (Eid al-Fitr)." This indicates the impermissibility of celebrating any other days. As for the belief of some that sacrificing on these innovated holidays is a reason for increasing olives and blessings, this is a false belief. If the slaughtering on these innovated holidays is performed in the Islamically prescribed manner, then its meat is not forbidden to eat. However, one should not eat from it nor should a Muslim attend these celebrations, as a form of rejection, unless the attendance is for giving advice without participation. But if the slaughtering is for the owner of the innovation (mawlid), then it is major shirk (polytheism).