Days until August 21
August 21 falls on a Friday in 2026 and a Saturday in 2027. The count runs from today’s date on your device to the next August 21; pick another date to count from it instead.
- Days until August 21
- 325
From September 30, 2026, there are 325 days until August 21 on Saturday, August 21, 2027.
- Date
- Saturday, August 21, 2027
- Day of the week
- Saturday
- In weeks
- 46 weeks and 3 days
Answer for the example date Wednesday, September 30, 2026. It changes to today's date when the page loads.
Days until August 21: 325. From September 30, 2026, there are 325 days until August 21 on Saturday, August 21, 2027.
Where is August 21 on the calendar?
How to calculate
Counts the days from today, or any date you choose, to the next August 21, with its day of the week.
Example with the default inputs (Count from September 30, 2026) on the example date Wednesday, September 30, 2026: From September 30, 2026, there are 325 days until August 21 on Saturday, August 21, 2027.
Method: Find the first August 21 on or after the start date, then count the days from the start date to it.
- August 21 comes every year, so the count is never more than 365 days.
- The start date itself is not counted: from the day before August 21, the count is 1; on August 21 itself, it is 0.
- Start dates from January 1, 1900 to December 31, 2400 work for the count to August 21, the range the date field accepts.
- Today is the date on your own device, so the count to August 21 changes at midnight where you are. Dates are whole calendar days, so a daylight-saving change never adds or loses a day.
Worked examples
Each example is checked against the calculator on every build.
- Count from 2027-08-21 gives Date 2027-08-21, Days until August 21 0.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
- Count from 2027-01-01 gives Date 2027-08-21, Days until August 21 232.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
- Count from 2027-08-22 gives Date 2028-08-21, Days until August 21 365.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
Other questions people ask
What day of the week is August 21?
Friday, August 21, 2026; Saturday, August 21, 2027; Monday, August 21, 2028. The weekday of August 21 moves on one day a year, or two when a February 29 falls between.
What day of the year is August 21?
August 21 is day 233 of a common year and day 234 of a leap year, such as 2028. Either way, 132 days of the year come after it.
What season is August 21 in?
In the Northern Hemisphere, August 21 is in summer in every year from 2026 to 2035; in the Southern Hemisphere, it is winter. Seasons here start on the astronomical equinoxes and solstices, dated in US Eastern Time.
Is August 21 a US federal holiday?
No. No US federal holiday falls on August 21. The next one in the calendar after August 21 is Labor Day, which falls between September 1 and September 7.
How are the days until August 21 counted?
From the start date to August 21, without counting the start date: from August 20 the count is 1, and on August 21 it is 0. The day after, it moves on to the next August 21: from August 22, 2026, that is August 21, 2027, 364 days away.