There is no single "death date" for the Nintendo 64; it was a gradual decline rather than an abrupt stop. Here is the timeline of its life cycle:
By late 2001, the platform was effectively in "end‑of‑life" status, with developers shifting focus to the GameCube and PS2. The N64 lingered on shelves and in homes for years after, but 2001–2002 marks the definitive end of its commercial relevance.