How long ago
Time since September 11, 2001
September 11, 2001 terrorist attacks killed nearly 3,000 people and reshaped US security and foreign policy. Track elapsed time with context, facts, and careful memorial framing.
Time elapsed
…
Anchor date: Tuesday, September 11, 2001
9/11 was 24 years, 10 months, and 22 days ago (9,091 total days) as of today — anchor Tuesday, September 11, 2001.
Quick facts
- Date
- September 11, 2001
- Primary sites
- World Trade Center, Pentagon, Shanksville PA
- Lives lost
- Nearly 3,000 people
- Memorial museums
- 9/11 Memorial & Museum (NYC); Flight 93; Pentagon
- National day
- Patriot Day (observed annually)
How we calculate
Elapsed time is the difference between now and the anchor date below, broken into calendar years, months, and days, plus a live hours/minutes/seconds clock.
Anchor ISO: 2001-09-11 · day-level anchors use a noon local interpretation to avoid DST edge flips.
Timeline
- 2001-09-11 Coordinated attacks in NY, DC area, and Pennsylvania.
- 2001-10 US-led operations in Afghanistan begin.
- 2002 Department of Homeland Security created.
- 2011 9/11 Memorial opens at World Trade Center site.
Related dates
Places on US5
Tools & time
FAQ
Why does this page exist?
People search for elapsed time since 9/11. We provide an accurate clock plus sober facts and official memorial links — not sensational framing.
What date is used for the clock?
The calendar date September 11, 2001 (noon local anchor for day-level math). Anniversary remembrances typically focus on that date.
Where are the memorials?
Major sites include New York City, the Pentagon in Virginia/DC area, and Flight 93 National Memorial in Pennsylvania. Use US5 state pages to navigate those regions.
How should I teach kids the timeline?
Pair the clock with primary sources and memorial sites linked below. Avoid graphic imagery; focus on remembrance and verified facts.