{
  "id": "days-until-black-friday",
  "version": "d05f9791813c",
  "status": "published",
  "name": "Days Until Black Friday",
  "question": "Days until Black Friday",
  "summary": "Counts the days from today, or any date you choose, to the next Black Friday, with its date and day of the week.",
  "category": "days",
  "subcategory": "countdowns",
  "url": "https://www.acalculator.org/days/days-until-black-friday",
  "markdown": "https://www.acalculator.org/days/days-until-black-friday.md",
  "kind": "function",
  "method": "Find the first date of Black Friday on or after the start date, then count the days from the start date to it.",
  "assumptions": [
    "Black Friday is the day after US Thanksgiving (the fourth Thursday of November).",
    "Start dates from January 1, 1986 to December 31, 2400 work, because the US federal holiday rules used here start in 1986.",
    "The start date itself is not counted: from the day before, the count is 1; on the day itself, it is 0.",
    "Dates are calendar days with no time of day, so a time zone or a daylight-saving change never adds or loses a day."
  ],
  "inputs": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "object",
    "properties": {
      "from": {
        "title": "Count from",
        "description": "The date to count from. Today, unless you change it.",
        "type": "string",
        "format": "date"
      }
    }
  },
  "outputs": {
    "days": {
      "label": "Days until Black Friday",
      "description": "Whole days from the start date to the next Black Friday; 0 on the day itself.",
      "format": "integer"
    },
    "date": {
      "label": "Date",
      "description": "The next date of Black Friday on or after the start date.",
      "format": "date-long"
    },
    "weekday": {
      "label": "Day of the week",
      "description": "The weekday of that date.",
      "format": "text"
    },
    "weeks": {
      "label": "In weeks",
      "description": "The same number of days in weeks and days.",
      "format": "text"
    }
  },
  "defaultAnswer": {
    "inputs": {
      "from": "2026-09-29"
    },
    "outputs": {
      "days": 59,
      "date": "2026-11-27",
      "weekday": "Friday",
      "weeks": "8 weeks and 3 days"
    },
    "text": "From September 29, 2026, there are 59 days until Black Friday on Friday, November 27, 2026."
  },
  "examples": [
    {
      "given": {
        "from": "2026-01-01"
      },
      "expect": {
        "date": "2026-11-27",
        "days": 330
      },
      "source": "5 U.S.C. 6103 (federal holidays), with OPM federal holiday schedules"
    },
    {
      "given": {
        "from": "2026-11-28"
      },
      "expect": {
        "date": "2027-11-26",
        "days": 363
      },
      "source": "5 U.S.C. 6103 (federal holidays), with OPM federal holiday schedules"
    }
  ],
  "sources": [
    "5 U.S.C. 6103 (federal holidays), with OPM federal holiday schedules"
  ],
  "related": [
    "days-until-winter",
    "days-until-christmas-eve",
    "days-until-christmas",
    "days-until-new-years-eve",
    "days-until-new-year",
    "days-between-dates"
  ],
  "changelog": []
}