How long until August 21?
It is 349 days, 3 hours, 41 minutes, 22 seconds until August 21, 2027.
Countdown to Any Calendar Date
Select any month and day or jump to major cultural and astronomical milestones.
Temporal Context & Calendar Metrics for August 21
Excludes 99 weekend days (Saturdays & Sundays).
63.8% of annual orbital cycle.
Summer Solstice occurred June 21
Fire element (Jul 23 - Aug 22).
About August 21: Significance & History
Calendar Significance & Context
World Senior Citizens DayAugust 21 marks the 233rd day of the year (234th in leap years) within the third quarter. Historically, key milestones on this date include the events of 1911 (Leonardo da Vinci's Mona Lisa is stolen from the Louvre Museum in Paris by employee Vincenzo Peruggia) and 1959 (Hawaii is admitted as the 50th U.S. state by presidential proclamation). Notable figures born on this day include King William IV (born 1765) and Sergey Brin (born 1973). The date also observes World Senior Citizens Day.
On This Day in History
- 1911
Leonardo da Vinci's Mona Lisa is stolen from the Louvre Museum in Paris by employee Vincenzo Peruggia.
- 1959
Hawaii is admitted as the 50th U.S. state by presidential proclamation.
- 1986
A limnic eruption at Lake Nyos in Cameroon releases a cloud of carbon dioxide, suffocating over 1,700 people.
Notable Birthdays
- King William IVb. 1765
King of the United Kingdom and Hanover from 1830 to 1837.
- Sergey Brinb. 1973
American computer scientist and internet entrepreneur who co-founded Google.
- Usain Boltb. 1986
Jamaican sprinter, eight-time Olympic gold medalist, and world record holder in the 100m and 200m.
Explore Related Calendar Dates
Adjacent Calendar Days:
Day 21 Across All Months:
Frequently Asked Questions About August 21
Which astronomical season and quarter does August 21 belong to?
August 21 falls in the astronomical season of Summer within Q3 of the calendar year. (Summer Solstice occurred June 21).
How do I set an alarm chime for when August 21 arrives?
Click "Set Alarm" on the action toolbelt. When the live chronometer reaches 00:00:00 (midnight of August 21), an audio harmonic chime will ring in real-time.
How many total hours and minutes are there until August 21?
There are approximately 8,379 total hours (502,781 minutes or 30,166,882 seconds) remaining until the start of August 21.
How many days are left in Q3 around August 21?
August 21 is situated in Q3. Each financial and calendar quarter spans approximately 90 to 92 days of diurnal tracking.