2001 is a year that most people remember in two parts: before September 11th and after it. The World Trade Center events cast such a long shadow over everything that followed that the rest of the year can feel like a footnote, which is a strange thing to say about twelve months that were absolutely packed.
The r/25yearsago subreddit exists to fix that. A community dedicated to documenting everything that was happening a quarter century ago, it is a rolling reminder that 2001 was also the year of iPods and Shrek and Destiny's Child and a hundred other things that shaped the culture in ways that are still visible today. Some of these posts will make you nostalgic. All of them will make you do the math at least once and refuse to believe the answer.