Days until August 17
August 17 falls on a Monday in 2026 and a Tuesday in 2027. The count runs from today’s date on your device to the next August 17; pick another date to count from it instead.
- Days until August 17
- 321
From September 30, 2026, there are 321 days until August 17 on Tuesday, August 17, 2027.
- Date
- Tuesday, August 17, 2027
- Day of the week
- Tuesday
- In weeks
- 45 weeks and 6 days
Answer for the example date Wednesday, September 30, 2026. It changes to today's date when the page loads.
Days until August 17: 321. From September 30, 2026, there are 321 days until August 17 on Tuesday, August 17, 2027.
Where is August 17 on the calendar?
How to calculate
Counts the days from today, or any date you choose, to the next August 17, 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 321 days until August 17 on Tuesday, August 17, 2027.
Method: Find the first August 17 on or after the start date, then count the days from the start date to it.
- August 17 comes every year, so the count is never more than 365 days.
- The start date itself is not counted: from the day before August 17, the count is 1; on August 17 itself, it is 0.
- Start dates from January 1, 1900 to December 31, 2400 work for the count to August 17, the range the date field accepts.
- Today is the date on your own device, so the count to August 17 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 2027-08-17 gives Date 2027-08-17, Days until August 17 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 2027-08-17, Days until August 17 228.Source: U.S. Naval Observatory, Leap Years: the Gregorian leap year rule (https://aa.usno.navy.mil/faq/leap_years)
- Count from 2027-08-18 gives Date 2028-08-17, Days until August 17 365.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 17?
Monday, August 17, 2026; Tuesday, August 17, 2027; Thursday, August 17, 2028. The weekday of August 17 moves on one day a year, or two when a February 29 falls between.
What day of the year is August 17?
August 17 is day 229 of a common year and day 230 of a leap year, such as 2028. Either way, 136 days of the year come after it.
What season is August 17 in?
In the Northern Hemisphere, August 17 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 17 a US federal holiday?
No. No US federal holiday falls on August 17. The next one in the calendar after August 17 is Labor Day, which falls between September 1 and September 7.
How are the days until August 17 counted?
From the start date to August 17, without counting the start date: from August 16 the count is 1, and on August 17 it is 0. The day after, it moves on to the next August 17: from August 18, 2026, that is August 17, 2027, 364 days away.