Based on the search results, we cannot determine which Muslim holiday is being celebrated today. However, we can provide information on the two official Islamic holidays: Eid Al-Fitr and Eid Al-Adha. Eid Al-Fitr is celebrated at the end of the month of Ramadan, while Eid Al-Adha lands on the 10th day of Dhu al-Hijjah, the final month of the Islamic calendar. It is worth noting that Shia and Sunni Muslims do not celebrate the same holiday schedule, and that practices vary by nation.