This paper was presented at the opening conference of the XXVI National Symposium of History, which commemorated the fiftieth anniversary of the founding of ANPUH: Brazil - the National History Association. At the same time as analyzing the various senses of celebrating, dealing with the relationship between the practices of commemoration and the work of the historian, which is a reflection on the relationship between memory, temporality and rituals of commemoration, this text is also a commemorative text, and thus subject to the same ambiguities and antinomies that it highlights in every gesture of celebration. It is at the same time, an analysis of the practices of commemoration and a commemorative text, and thus both border and antinomian.
celebration; border time; memory