Occasion for fireworks: Abbr. (3)

I believe the answer is:

nye

(Other definitions for nye that I've seen before include "- - Bevan, 13 dn" , "Nickname of Aneurin Bevan" , "- - Bevan (NHS pioneer)" , "- Bevan, former Labour politician" , "- - Bevan (politics)" .)

I've seen this clue in The New York Times.

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