# NaNoWriMo early expansion

> A 21-person writing experiment grew to roughly 5,000 participants in its third year.

- Owner: Chris Baty
- Kind: Activity
- Sector: Culture (no sector)
- Seed date: Jul 1999
- Milestone date: Nov 2001
- Date basis: Documented milestone; not a measured attention peak. Dates use the stated precision; chart positions are date anchors.
- Spread Score: 10 (Niche, provisional), v1.2
- Mechanics: Maker origin, Platform jump, Press loop

## Summary

Chris Baty’s small writing experiment became a shared November deadline. A website and invitations widened participation; the third year brought about 5,000 writers and overwhelmed manual signups. The format later reached classrooms.

## Timeline

- Jul 1999 — Chris Baty and friends (Open web) — The first month-long novel-writing experiment gathered 21 participants.
- Nov 2000 — NaNoWriMo participants (Open web) — A website and new invitations expanded the November challenge to 140 writers.
- Nov 2001 — Milestone: NaNoWriMo participants (Open web) — About 5,000 participants overwhelmed the manually administered signup process.

The full timeline, metrics and sources are on the case page, or via the Pro API (https://howitspread.com/developers).

Canonical URL: https://howitspread.com/cases/nanowrimo-early-expansion

Cite as: How It Spread (2026). “NaNoWriMo early expansion.” Case HIS-01094. Spread Score v1.2: 10/100. Updated 2026-10-17. https://howitspread.com/id/HIS-01094