{
  "dataset": "ForceFolks Salesforce Release Calendar",
  "publisher": "ForceFolks",
  "page": "https://forcefolks.com/salesforce-release-dates/",
  "license": "CC BY 4.0 for original ForceFolks material. Credit ForceFolks and link to the page. Salesforce documentation retains its own rights.",
  "date_modified": "2026-10-06",
  "checked_at": "2026-10-06",
  "note": "All-day planning markers, not exact outage windows. Winter dates retain published date ranges and Pacific planning days. Spring examples use UTC dates for named Trust records. Only the four scheduled Spring markers have tentative ICS status.",
  "milestones": [
    {
      "id": "winter-27-notes",
      "release": "Winter '27",
      "milestone": "Release notes published",
      "date": "2026-08-19",
      "end_date": "2026-08-19",
      "tz": "Published calendar date",
      "status": "confirmed",
      "note": "Official release countdown.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Admin Release Countdown: Winter '27",
          "url": "https://admin.salesforce.com/blog/2026/admin-winter-27-release-countdown",
          "publisher": "Salesforce Admins",
          "published_at": "2026-08-06",
          "checked_at": "2026-10-06"
        }
      ]
    },
    {
      "id": "winter-27-refresh",
      "release": "Winter '27",
      "milestone": "Sandbox refresh cutoff date",
      "date": "2026-08-27",
      "end_date": "2026-08-27",
      "tz": "Pacific planning day",
      "status": "confirmed",
      "note": "Refresh must finish before the cutoff. Help specifies 6 p.m. PT. The countdown heading says before 5 p.m. PT.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Salesforce Sandbox Preview Instructions",
          "url": "https://help.salesforce.com/s/articleView?id=000391927&language=en_US&type=1",
          "publisher": "Salesforce Help",
          "published_at": "2026-07-14",
          "checked_at": "2026-10-06"
        }
      ]
    },
    {
      "id": "winter-27-preview",
      "release": "Winter '27",
      "milestone": "Preview sandbox upgrades",
      "date": "2026-08-28",
      "end_date": "2026-08-29",
      "tz": "Published calendar dates",
      "status": "confirmed",
      "note": "Exact window depends on the sandbox instance.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Salesforce Sandbox Preview Instructions",
          "url": "https://help.salesforce.com/s/articleView?id=000391927&language=en_US&type=1",
          "publisher": "Salesforce Help",
          "published_at": "2026-07-14",
          "checked_at": "2026-10-06"
        }
      ]
    },
    {
      "id": "winter-27-wave-1",
      "release": "Winter '27",
      "milestone": "Production wave 1 planning day",
      "date": "2026-09-04",
      "end_date": "2026-09-04",
      "tz": "Pacific planning day",
      "status": "confirmed",
      "note": "Check your instance on Salesforce Trust.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Admin Release Countdown: Winter '27",
          "url": "https://admin.salesforce.com/blog/2026/admin-winter-27-release-countdown",
          "publisher": "Salesforce Admins",
          "published_at": "2026-08-06",
          "checked_at": "2026-10-06"
        }
      ]
    },
    {
      "id": "winter-27-wave-2",
      "release": "Winter '27",
      "milestone": "Production wave 2 planning day",
      "date": "2026-10-02",
      "end_date": "2026-10-02",
      "tz": "Pacific planning day",
      "status": "confirmed",
      "note": "Check your instance on Salesforce Trust.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Admin Release Countdown: Winter '27",
          "url": "https://admin.salesforce.com/blog/2026/admin-winter-27-release-countdown",
          "publisher": "Salesforce Admins",
          "published_at": "2026-08-06",
          "checked_at": "2026-10-06"
        }
      ]
    },
    {
      "id": "winter-27-wave-3",
      "release": "Winter '27",
      "milestone": "Production wave 3 planning day",
      "date": "2026-10-09",
      "end_date": "2026-10-09",
      "tz": "Pacific planning day",
      "status": "confirmed",
      "note": "Check your instance on Salesforce Trust.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Admin Release Countdown: Winter '27",
          "url": "https://admin.salesforce.com/blog/2026/admin-winter-27-release-countdown",
          "publisher": "Salesforce Admins",
          "published_at": "2026-08-06",
          "checked_at": "2026-10-06"
        }
      ]
    },
    {
      "id": "winter-27-non-preview",
      "release": "Winter '27",
      "milestone": "Non-preview sandbox upgrades",
      "date": "2026-10-09",
      "end_date": "2026-10-10",
      "tz": "Published calendar dates",
      "status": "confirmed",
      "note": "Exact window depends on the sandbox instance.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Salesforce Sandbox Preview Instructions",
          "url": "https://help.salesforce.com/s/articleView?id=000391927&language=en_US&type=1",
          "publisher": "Salesforce Help",
          "published_at": "2026-07-14",
          "checked_at": "2026-10-06"
        }
      ]
    },
    {
      "id": "spring-27-preview",
      "release": "Spring '27",
      "milestone": "Preview sandbox example",
      "date": "2027-01-09",
      "end_date": "2027-01-09",
      "tz": "UTC planning day",
      "status": "scheduled",
      "note": "Example instance USA270S. Future planning marker, not an org-specific maintenance appointment.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Spring '27 Trust record 20163638 (USA270S)",
          "url": "https://status.salesforce.com/maintenances/20163638",
          "publisher": "Salesforce Trust",
          "published_at": "2026-08-20",
          "checked_at": "2026-10-06",
          "updated_at": "2026-08-20T00:09:15.154Z",
          "api_url": "https://api.status.salesforce.com/v1/maintenances/20163638"
        }
      ],
      "trust_example": {
        "maintenance_id": 20163638,
        "instance": "USA270S",
        "planned_start": "2027-01-09T03:00:00.000Z",
        "planned_end": "2027-01-09T03:30:00.000Z",
        "source_status": "Confirmed"
      }
    },
    {
      "id": "spring-27-wave-1",
      "release": "Spring '27",
      "milestone": "Production wave 1 example",
      "date": "2027-01-16",
      "end_date": "2027-01-16",
      "tz": "UTC planning day",
      "status": "scheduled",
      "note": "Example instance USA322. Future planning marker, not an org-specific maintenance appointment.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Spring '27 Trust record 20163800 (USA322)",
          "url": "https://status.salesforce.com/maintenances/20163800",
          "publisher": "Salesforce Trust",
          "published_at": "2026-08-20",
          "checked_at": "2026-10-06",
          "updated_at": "2026-08-20T00:11:39.233Z",
          "api_url": "https://api.status.salesforce.com/v1/maintenances/20163800"
        }
      ],
      "trust_example": {
        "maintenance_id": 20163800,
        "instance": "USA322",
        "planned_start": "2027-01-16T05:30:00.000Z",
        "planned_end": "2027-01-16T06:00:00.000Z",
        "source_status": "Confirmed"
      }
    },
    {
      "id": "spring-27-wave-2",
      "release": "Spring '27",
      "milestone": "Production wave 2 example",
      "date": "2027-02-06",
      "end_date": "2027-02-06",
      "tz": "UTC planning day",
      "status": "scheduled",
      "note": "Example instance USA320. Future planning marker, not an org-specific maintenance appointment.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Spring '27 Trust record 20163877 (USA320)",
          "url": "https://status.salesforce.com/maintenances/20163877",
          "publisher": "Salesforce Trust",
          "published_at": "2026-08-20",
          "checked_at": "2026-10-06",
          "updated_at": "2026-08-20T00:12:51.696Z",
          "api_url": "https://api.status.salesforce.com/v1/maintenances/20163877"
        }
      ],
      "trust_example": {
        "maintenance_id": 20163877,
        "instance": "USA320",
        "planned_start": "2027-02-06T06:00:00.000Z",
        "planned_end": "2027-02-06T06:30:00.000Z",
        "source_status": "Confirmed"
      }
    },
    {
      "id": "spring-27-wave-3",
      "release": "Spring '27",
      "milestone": "Production wave 3 example",
      "date": "2027-02-20",
      "end_date": "2027-02-20",
      "tz": "UTC planning day",
      "status": "scheduled",
      "note": "Example instance NA251. Future planning marker, not an org-specific maintenance appointment.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Spring '27 Trust record 20164210 (NA251)",
          "url": "https://status.salesforce.com/maintenances/20164210",
          "publisher": "Salesforce Trust",
          "published_at": "2026-08-20",
          "checked_at": "2026-10-06",
          "updated_at": "2026-08-20T00:17:59.464Z",
          "api_url": "https://api.status.salesforce.com/v1/maintenances/20164210"
        }
      ],
      "trust_example": {
        "maintenance_id": 20164210,
        "instance": "NA251",
        "planned_start": "2027-02-20T06:00:00.000Z",
        "planned_end": "2027-02-20T06:05:00.000Z",
        "source_status": "Confirmed"
      }
    },
    {
      "id": "spring-27-oauth-retirement",
      "release": "Spring '27",
      "milestone": "Connected App username-password flow retirement",
      "date": "2027-02-20",
      "end_date": "2027-02-20",
      "tz": "Time zone not specified by source",
      "status": "confirmed",
      "note": "Separate release-update enforcement deadline, not a production wave.",
      "checked_at": "2026-10-06",
      "sources": [
        {
          "title": "Winter '27 Release Updates",
          "url": "https://help.salesforce.com/s/articleView?id=release-notes.rn_ru.htm&language=en_US&type=5",
          "publisher": "Salesforce Help",
          "published_at": null,
          "checked_at": "2026-10-06"
        }
      ]
    }
  ],
  "timezone_example": {
    "maintenance_id": 20136466,
    "instance": "USA320",
    "utc_start": "2026-10-03T05:00:00Z",
    "pacific_start": "2026-10-02T22:00:00-07:00",
    "source_url": "https://status.salesforce.com/maintenances/20136466",
    "checked_at": "2026-10-06"
  }
}