180 days from 19 August 2026 is Monday, 15 February 2027
Counting forward 180 days from Wednesday, 19 August, and not counting today itself, the answer is Monday, 15 February 2027. Written out, that is 2027-02-15 in ISO 8601 form, 2/15/2027 in the US month-first format and 15/02/2027 day-first. It falls in ISO week 7 of 2027 and is day 46 of 365, with 319 days of 2027 still to run after it.
The same span, counted other ways
180 calendar days is 25 weeks and 5 days, about 5.91 months, and 4,320 hours — though 4,320 is the nominal figure, because this span crosses a clock change and so contains 4,320 plus one hour of actual elapsed time. Counting only Monday to Friday there are 128 weekdays and 52 weekend days in it, and after removing 8 US federal holidays that leaves 120 business days. If what you actually want is 180 business days rather than 180 days, that is a different date.
Holidays it steps over. 8 US federal holidays fall on a weekday inside this span: Labor Day on 7 September 2026; Columbus Day on 12 October 2026; Veterans Day on 11 November 2026; Thanksgiving on 26 November 2026; Christmas Day on 25 December 2026; New Year's Day on 1 January 2027; Martin Luther King Jr. Day on 18 January 2027 and Presidents' Day on 15 February 2027. Those days are included in the calendar-day answer above and excluded from the business-day figure.Where a holiday falls at a weekend, federal offices observe it on the adjacent Friday or Monday, and it is the observed date that we skip — the full list and its source are on the holiday sources page.
Monday, 15 February 2027 is Presidents' Day. The third Monday in February, between 15 and 21 February. Its legal federal name is Washington's Birthday; several states use different names and some observe a different day. It is one of the eleven US federal holidays, so banks, federal offices and most schools are closed and it does not count as a business day.Count down to Presidents' Day.
This span crosses a clock change. Daylight saving ends in the United States on 1 November 2026. The calendar date is unaffected — adding whole calendar days cannot be moved by a clock change, which is exactly why this site adds days to the (year, month, day) components rather than adding 86,400,000 milliseconds at a time. What does change is elapsed wall-clock time: the day the clocks go forward is 23 hours long and the day they go back is 25, so an hours calculation across this span differs from the naive one by an hour. See the time calculator if that is the number you need.
The span crosses 6 month boundarys: it runs from August 2026 into February 2027, and over 1 year boundary into 2027.
Why 180 days specifically
The completion deadline in an IRS section 1031 exchange — the replacement property must be acquired within 180 days of the sale, or by the tax return due date if that is sooner. Also the Schengen area's 180-day reference period, within which a visitor may stay ninety days, and the maximum supply period for many repeat prescriptions. Measured at 52,000 searches a month.
This is arithmetic, not legal, tax or immigration advice. Deadlines in contracts, court rules and tax codes have their own counting conventions and holiday sets — check yours against the terms of use and the counting rules we use.
Does today count?
No — and this is where calculators disagree, so it is worth being explicit. On this page day 1 is tomorrow, 20 August 2026, and the start date is not included. That gives Monday, 15 February 2027. If your contract, court rule or notice period counts today as day one, the answer you want is one day earlier: Sunday, 14 February 2027. Both numbers are on this page deliberately, because re-checking an off-by-one on a second site is the most common reason anyone looks a date offset up twice.
Every convention used above — whether the start date counts, how month ends are clamped, which holidays close an office — is written out on the methodology page, including the business-day rule and the holiday set behind the 120-business-day figure above.