{
  "id": "days-until-memorial-day",
  "version": "215dbd00fd4b",
  "status": "published",
  "name": "Days Until Memorial Day",
  "question": "Days until Memorial Day",
  "summary": "Counts the days from today, or any date you choose, to the next Memorial Day, with its date and day of the week.",
  "category": "days",
  "subcategory": "countdowns",
  "url": "https://www.acalculator.org/days/days-until-memorial-day",
  "markdown": "https://www.acalculator.org/days/days-until-memorial-day.md",
  "kind": "function",
  "method": "Find the first date of Memorial Day on or after the start date, then count the days from the start date to it.",
  "assumptions": [
    "Memorial Day is the last Monday of May.",
    "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 Memorial Day",
      "description": "Whole days from the start date to the next Memorial Day; 0 on the day itself.",
      "format": "integer"
    },
    "date": {
      "label": "Date",
      "description": "The next date of Memorial Day 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": 244,
      "date": "2027-05-31",
      "weekday": "Monday",
      "weeks": "34 weeks and 6 days"
    },
    "text": "From September 29, 2026, there are 244 days until Memorial Day on Monday, May 31, 2027."
  },
  "examples": [
    {
      "given": {
        "from": "2026-01-01"
      },
      "expect": {
        "date": "2026-05-25",
        "days": 144
      },
      "source": "5 U.S.C. 6103 (federal holidays), with OPM federal holiday schedules"
    },
    {
      "given": {
        "from": "2026-05-26"
      },
      "expect": {
        "date": "2027-05-31",
        "days": 370
      },
      "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-summer",
    "days-until-fathers-day",
    "days-until-fourth-of-july",
    "days-until-labor-day",
    "days-until-fall",
    "days-between-dates"
  ],
  "changelog": []
}