Nakba Day is generally commemorated by Fatah, Hamas, and pro Palestinan groups like PCS. It occurs on 15 May, the day after the Gregorian calendar date for Israeli Independence Day. For the Palestinians it is an annual day of commemoration of the displacement that preceded and followed the Israeli Declaration of Independence in 1948.
However, Nakba means catastrophe and the Nakba celbrated by ntodays Palestinains is nto the opriginal Nakba. On page 312 of The Arab Awakening, Antonius writes: ‘The year 1920 has an evil name in Arab annals: it is referred to as the Year of the Catastrophe (Aam An-Nakba). It saw the first armed risings that occurred in protest against the post-War settlement imposed by the Allies on the Arab countries. In that year, serious outbreaks took place in Syria, Palestine, and Iraq.’ The original Nakba had nothing to do with Jews, and nothing to do with demands by Palestinian Arabs for self-determination, independence and statehood. To the contrary, it had everything to do with the fact that the Palestinian Arabs saw themselves as Syrians.” -Prof. Steven Plaut (“Nakba Means There’s No Palestine”)