Countdown
How many days until October 21?
359
days until October 21
The next October 21 is Thursday, October 21, 2027
The short answer
October 21 is 359 days away — that's 51 weeks and 2 days, roughly 11.8 months, or 8,616 hours. The next October 21 falls on a Thursday (Thursday, October 21, 2027). The number above updates automatically at midnight in your time zone.
October 21, 2027 at a glance
| Day of the week | Thursday |
|---|---|
| Day of the year | Day 294 of 365 |
| Share of the year passed | 81% |
| Days left in 2027 after it | 71 |
| Quarter | Q4 |
| Season (Northern Hemisphere) | Fall |
What's happening in October
October is the heart of fall — harvest season, Halloween on the 31st, and the end of daylight saving time approaching.
Other dates to know in October 2027: Halloween (October 31).
The 359 days until October 21, broken down
257
business days
102
weekend days
51
full weeks
2
extra days
That's 257 working days (Monday to Friday) and 102 weekend days — 51 Saturdays and 51 Sundays. Public holidays vary by country, so they aren't deducted.
On October 21 in history
- 1805Nelson defeats French-Spanish fleet at the Battle of Trafalgar
- 1879Thomas Edison tests his first practical incandescent light bulb
- 1966Aberfan colliery spoil tip collapse kills 144 in Wales
- 1967Massive anti-Vietnam War march on the Pentagon in Washington
Notable world events that happened on October 21 in earlier years.
Days around October 21
354
until October 16
355
until October 17
356
until October 18
357
until October 19
358
until October 20
360
until October 22
361
until October 23
362
until October 24
363
until October 25
364
until October 26
The 21st of other months
86
until January 21
117
until February 21
145
until March 21
176
until April 21
206
until May 21
237
until June 21
267
until July 21
298
until August 21
329
until September 21
25
until November 21
55
until December 21
Holidays near October 21
See every October countdown → · Count days between any two dates →