Eid Mubarak (Arabic: عيد مبارك‎, Persian/Urdu: عید مُبارک) is a traditional Muslim greeting reserved for use on the festivals of Eid ul-Adha and Eid ul-Fitr. The phrase translates into English as "blessed festival", and can be paraphrased as "may you enjoy a blessed festival". Muslims wish each other Eid Mubarak after performing the Eid prayer. This celebration continues until the end of the day for Eid ul-Fitr (or al-Fitr) and continues a further three days for Eid ul-Adha (or Al-Adha). However, in the social sense people usually celebrate Eid ul-Fitr in the same length as Eid ul-Adha, such as family visits, and exchange greetings, such as "Eid Mubarak". It is notable that saying these exact words is a cultural tradition influenced by deep roots of religion in it; however, it is not part of any religious obligations. Speakers of Arabic might also add "kul 'am wantum bikhair." Which means "[May] you be well every year"
Eid refers to the occasion itself, and Mubarak means 'Blessed'.
Throughout the Muslim world there are numerous other ways of greeting for Eid ul-Adha and Eid ul-Fitr. The Companions of the Islamic prophet Muhammad used to say to each other when they met on Eid