About this date
On September 11, 2001, four coordinated terrorist attacks hit the United States, destroying the World Trade Center towers in New York and damaging the Pentagon.
September 11, 2001 in numbers
| Fact | Value |
|---|---|
| Day of the week | Tuesday |
| Day of the year | Day 254 of 365 |
| ISO week | Week 37 |
| Quarter | Q3 |
| Leap year | No |
| Days until January 1, 2027 | 9,243 |
How the count works
From September 11, 2001 to January 1, 2027
Rest of 2001: September 11, 2001 → January 1, 2002 = 112 days
Full years 2002–2026: 25 × 365 + leap days = 9,131 days
Total: 9,243 days (6 leap days included)
Full years 2002–2026: 25 × 365 + leap days = 9,131 days
Total: 9,243 days (6 leap days included)
The live count at the top of the page keeps going from there, adding one every day at midnight.
Milestones since September 11, 2001
The dates when each milestone is or was reached:
| Milestone | Date |
|---|---|
| 100 days | Thursday, December 20, 2001 |
| 1,000 days | Monday, June 7, 2004 |
| 5,000 days | Thursday, May 21, 2015 |
| 10,000 days | Saturday, January 27, 2029 |
| 20,000 days | Wednesday, June 14, 2056 |
| 30,000 days | Sunday, October 31, 2083 |
| 40,000 days | Thursday, March 19, 2111 |
| 1 year | Wednesday, September 11, 2002 |
| 5 years | Monday, September 11, 2006 |
| 10 years | Sunday, September 11, 2011 |
| 25 years | Friday, September 11, 2026 |
| 50 years | Monday, September 11, 2051 |
| 100 years | Sunday, September 11, 2101 |
Upcoming anniversaries
| Anniversary | Date | Day of the week |
|---|---|---|
| 26th | September 11, 2027 | Saturday |
| 27th | September 11, 2028 | Monday |
| 28th | September 11, 2029 | Tuesday |
| 29th | September 11, 2030 | Wednesday |
| 30th | September 11, 2031 | Thursday |
| 31st | September 11, 2032 | Saturday |
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More “days since” counts
Since January 1, 2021Since January 1, 2022Since January 1, 2023Since January 1, 2024Since January 1, 2025Since January 1, 2026Since COVID-19 was declared a pandemicSince the first iPhone went on saleSince the Moon landingSince the fall of the Berlin WallSince D-DaySince the attack on Pearl HarborSince the Titanic sankSince the Declaration of Independence