Timeline
Twenty documented milestones — each dated from the public record.
1984 — Born in White Plains, New York
Mark Elliot Zuckerberg is born on 14 May 1984 to Karen Kempner Zuckerberg and Edward Zuckerberg, a dentist. He grows up in Dobbs Ferry, New York.
Mid-1990s — First programs
As a child he learns programming; his father tutors him and hires a private tutor. He builds “ZuckNet,” a messaging program linking the family home and his father’s dental office.
2002 — Graduates from Phillips Exeter Academy
Zuckerberg graduates from the elite New Hampshire boarding school, where he studied Latin and classics alongside programming, and built the Synapse music-recommendation program.
Fall 2002 — Enrolls at Harvard
He begins at Harvard University, studying psychology and computer science, living in Kirkland House.
October 2003 — Facemash
He launches Facemash, a site comparing student photos; Harvard shuts it down within days and he faces the Administrative Board. No expulsion follows.
February 4, 2004 — thefacebook launches
thefacebook.com goes live from his Harvard dorm room. Within weeks it spreads to Stanford, Columbia, and Yale.
Summer 2004 — Palo Alto
Zuckerberg, Dustin Moskovitz, and others move to Palo Alto, California; Zuckerberg leaves Harvard. Peter Thiel invests $500,000; the company incorporates in Florida that July.
2005 — Accel invests; drops the “the”
Accel Partners invests $12.7 million at an ~$87.5 million valuation. The site buys facebook.com for $200,000 and drops “the.”
September 2006 — News Feed launches
Facebook replaces static profiles with an algorithmic stream of friends’ activity. Protests erupt; then engagement and growth accelerate.
2007 — Platform and Microsoft
Facebook Platform opens the site to third-party developers; Microsoft invests $240 million at a $15 billion valuation.
2008 — Sandberg joins; founding dispute settled
Sheryl Sandberg joins as COO in March. In June, the Winklevoss/Saverin-era litigation settles for a reported $65 million in cash and stock (later re-valued higher as the stock rose).
2010 — 500 million users; the film
Facebook passes 500 million users. The Social Network premieres in October — a dramatization, not a documentary (see myth vs. record).
2012 — Instagram, IPO, marriage
April: Instagram acquired (~$1B). 18 May: the IPO — technically troubled, shares slump. 19 May: marries Priscilla Chan. October: Facebook passes 1 billion monthly users.
2014 — WhatsApp and Oculus
February: WhatsApp acquired for ~$19 billion. March: Oculus VR acquired for ~$2 billion. Both reshape the company’s future.
2015 — Chan Zuckerberg Initiative
On the birth of their first daughter, Zuckerberg and Chan pledge 99% of their Meta shares to the Chan Zuckerberg Initiative.
2016–2018 — Crisis years
Misinformation controversies, the Russian-interference reckoning, and in March 2018 the Cambridge Analytica revelations. April 2018: Zuckerberg testifies before Congress for the first time — nearly ten hours over two days.
2019 — Pivot to privacy
In a March 2019 note, Zuckerberg announces a shift toward private, encrypted, ephemeral messaging as the company’s direction.
2021 — Meta
28 October 2021: Facebook, Inc. becomes Meta Platforms, Inc. at the Connect conference, betting the company’s future on the metaverse.
2022–2023 — Year of efficiency; Llama
After ad-business shocks and metaverse spending criticism, Meta cuts ~21,000 jobs across late 2022 and 2023. In 2023 it open-sources Llama 2, becoming a central player in AI.
2024–2026 — Open-source AI and the present
Meta pushes Llama models, massive GPU buildouts, and AI features across its apps; Threads (2023) grows as a text rival to X. Zuckerberg remains founder, chairman, and CEO with majority voting control.
Source notes
- Company milestones: Meta newsroom and SEC filings; user figures are “daily active people” as reported in earnings.
- Biographical detail: Kirkpatrick (2010); contemporary reporting cited per era page.
- Deal sizes are announced values; IPO and testimony dates are matters of public record.