diff --git a/.assets/timeline-gantt.png b/.assets/timeline-gantt.png
index bf9f322..908bb62 100644
Binary files a/.assets/timeline-gantt.png and b/.assets/timeline-gantt.png differ
diff --git a/CALENDAR.md b/CALENDAR.md
index ad32d5a..b7d667e 100644
--- a/CALENDAR.md
+++ b/CALENDAR.md
@@ -74,7 +74,7 @@ Full untruncated version index.
 |   stable2506-9 | 1.19.9 | 2026-03-10 | 2026-03-10 |  | [Released](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2506-9) |
 |   stable2506-10 | 1.19.10 | 2026-04-10 | 2026-04-10 |  | [Released](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2506-10) |
 |   stable2506-11 | 1.19.11 | 2026-05-07 | 2026-05-07 |  | [Released](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2506-11) |
-|   stable2506-12 | 1.19.12 | 2026-06-01 | 2026-06-04 |  | Planned |
+|   stable2506-12 | 1.19.12 | 2026-06-10 | 2026-06-10 |  | [Released](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2506-12) |
 | **stable2503** | 1.18.0 | 2025-02-17 | 2025-04-08 | 2026-03-31 | ~~[Deprecated](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2503)~~ |
 |   stable2503-1 | 1.18.1 | 2025-05-05 | 2025-05-05 |  | ~~[Deprecated](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2503-1)~~ |
 |   stable2503-2 | 1.18.2 | 2025-05-07 | 2025-05-07 |  | ~~[Deprecated](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2503-2)~~ |
diff --git a/README.md b/README.md
index 11be1ef..53dd4d3 100644
--- a/README.md
+++ b/README.md
@@ -43,10 +43,9 @@ Planned and historic release dates:
 |   stable2509-9 | 1.20.9 | 2026-06-08 | 2026-06-11 |  | Planned |
 |   [5 more past, 4 more planned](CALENDAR.md) |  |  | | |
 | **stable2506** | 1.19.0 | 2025-05-15 | 2025-07-24 | 2026-06-30 | [Released](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2506) |
-|   stable2506-10 | 1.19.10 | 2026-04-10 | 2026-04-10 |  | [Released](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2506-10) |
 |   stable2506-11 | 1.19.11 | 2026-05-07 | 2026-05-07 |  | [Released](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2506-11) |
-|   stable2506-12 | 1.19.12 | 2026-06-01 | 2026-06-04 |  | Planned |
-|   [9 more past](CALENDAR.md) |  |  | | |
+|   stable2506-12 | 1.19.12 | 2026-06-10 | 2026-06-10 |  | [Released](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2506-12) |
+|   [10 more past](CALENDAR.md) |  |  | | |
 | **stable2503** | 1.18.0 | 2025-02-17 | 2025-04-08 | 2026-03-31 | ~~[Deprecated](https://github.com/paritytech/polkadot-sdk/releases/tag/polkadot-stable2503)~~ |
 |   stable2503-13 | 1.18.13 | 2025-12-22 | 2025-12-25 |  | ~~Cancelled~~ |
 |   stable2503-14 | 1.18.14 | 2026-01-26 | 2026-01-29 |  | ~~Cancelled~~ |
diff --git a/badges/polkadot-sdk-latest.svg b/badges/polkadot-sdk-latest.svg
index 613bc7f..6089fab 100644
--- a/badges/polkadot-sdk-latest.svg
+++ b/badges/polkadot-sdk-latest.svg
@@ -1 +1 @@
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\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" width="162" height="20" role="img" aria-label="Latest Release: stable2603"><title>Latest Release: stable2603</title><filter id="blur"><feGaussianBlur stdDeviation="16"/></filter><linearGradient id="s" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="r"><rect width="162" height="20" rx="3"/></clipPath><g clip-path="url(#r)"><rect width="91" height="20" fill="#555"/><rect x="91" width="71" height="20" fill="#67ac09"/><rect width="162" height="20" fill="url(#s)"/></g><g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" text-rendering="geometricPrecision" font-size="110"><g transform="scale(.1)"><g aria-hidden="true" fill="#010101"><text x="465" y="150" fill-opacity=".8" filter="url(#blur)" textLength="810">Latest Release</text><text x="465" y="150" fill-opacity=".3" textLength="810">Latest Release</text></g><text x="465" y="140" textLength="810">Latest Release</text></g><g transform="scale(.1)"><g aria-hidden="true" fill="#010101"><text x="1255" y="150" fill-opacity=".8" filter="url(#blur)" textLength="610">stable2603</text><text x="1255" y="150" fill-opacity=".3" textLength="610">stable2603</text></g><text x="1255" y="140" textLength="610">stable2603</text></g></g></svg>
\ No newline at end of file
diff --git a/badges/polkadot-sdk-next.svg b/badges/polkadot-sdk-next.svg
index a4e0967..675c1e7 100644
--- a/badges/polkadot-sdk-next.svg
+++ b/badges/polkadot-sdk-next.svg
@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="232" height="20" role="img" aria-label="Next Release (stable2606): 2026/07/02"><title>Next Release (stable2606): 2026/07/02</title><filter id="blur"><feGaussianBlur in="SourceGraphic" stdDeviation="16"/></filter><linearGradient id="s" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="r"><rect width="232" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#r)"><rect width="157" height="20" fill="#555"/><rect x="157" width="75" height="20" fill="#ea7233"/><rect width="232" height="20" fill="url(#s)"/></g><g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" text-rendering="geometricPrecision" font-size="110"><text aria-hidden="true" x="795" y="150" fill="#010101" fill-opacity=".80" filter="url(#blur)" transform="scale(.1)" textLength="1470">Next Release (stable2606)</text><text aria-hidden="true" x="795" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="1470">Next Release (stable2606)</text><text x="795" y="140" transform="scale(.1)" fill="#fff" textLength="1470">Next Release (stable2606)</text><text aria-hidden="true" x="1935" y="150" fill="#010101" fill-opacity=".80" filter="url(#blur)" transform="scale(.1)" textLength="650">2026/07/02</text><text aria-hidden="true" x="1935" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="650">2026/07/02</text><text x="1935" y="140" transform="scale(.1)" fill="#fff" textLength="650">2026/07/02</text></g></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" width="232" height="20" role="img" aria-label="Next Release (stable2606): 2026/07/02"><title>Next Release (stable2606): 2026/07/02</title><filter id="blur"><feGaussianBlur stdDeviation="16"/></filter><linearGradient id="s" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="r"><rect width="232" height="20" rx="3"/></clipPath><g clip-path="url(#r)"><rect width="157" height="20" fill="#555"/><rect x="157" width="75" height="20" fill="#ea7233"/><rect width="232" height="20" fill="url(#s)"/></g><g fill="#fff" text-anchor="middle" font-family="Verdana,Geneva,DejaVu Sans,sans-serif" text-rendering="geometricPrecision" font-size="110"><g transform="scale(.1)"><g aria-hidden="true" fill="#010101"><text x="795" y="150" fill-opacity=".8" filter="url(#blur)" textLength="1470">Next Release (stable2606)</text><text x="795" y="150" fill-opacity=".3" textLength="1470">Next Release (stable2606)</text></g><text x="795" y="140" textLength="1470">Next Release (stable2606)</text></g><g transform="scale(.1)"><g aria-hidden="true" fill="#010101"><text x="1935" y="150" fill-opacity=".8" filter="url(#blur)" textLength="650">2026/07/02</text><text x="1935" y="150" fill-opacity=".3" textLength="650">2026/07/02</text></g><text x="1935" y="140" textLength="650">2026/07/02</text></g></g></svg>
\ No newline at end of file
diff --git a/releases-v1.ics b/releases-v1.ics
index 3005cda..5c0ffa4 100644
--- a/releases-v1.ics
+++ b/releases-v1.ics
@@ -1054,17 +1054,17 @@ DESCRIPTION:Release of stable2506-11 (released)\n\nFull Calendar: https://
 END:VEVENT
 BEGIN:VEVENT
 SUMMARY:stable2506-12 Cutoff
-DTSTART;VALUE=DATE:20260601
-DTEND;VALUE=DATE:20260602
-DESCRIPTION:Cutoff for stable2506-12 (planned)\n\nFull Calendar: https://g
- ithub.com/paritytech/release-registry/blob/main/CALENDAR.md#calendar
+DTSTART;VALUE=DATE:20260610
+DTEND;VALUE=DATE:20260611
+DESCRIPTION:Cutoff for stable2506-12 (released)\n\nFull Calendar: https://
+ github.com/paritytech/release-registry/blob/main/CALENDAR.md#calendar
 END:VEVENT
 BEGIN:VEVENT
 SUMMARY:stable2506-12 Release
-DTSTART;VALUE=DATE:20260604
-DTEND;VALUE=DATE:20260605
-DESCRIPTION:Release of stable2506-12 (planned)\n\nFull Calendar: https://g
- ithub.com/paritytech/release-registry/blob/main/CALENDAR.md#calendar
+DTSTART;VALUE=DATE:20260610
+DTEND;VALUE=DATE:20260611
+DESCRIPTION:Release of stable2506-12 (released)\n\nFull Calendar: https://
+ github.com/paritytech/release-registry/blob/main/CALENDAR.md#calendar
 END:VEVENT
 BEGIN:VEVENT
 SUMMARY:stable2509 Cutoff
diff --git a/releases-v1.json b/releases-v1.json
index a2e5b6c..42e0aaa 100644
--- a/releases-v1.json
+++ b/releases-v1.json
@@ -934,13 +934,12 @@
           },
           {
             "name": "stable2506-12",
-            "cutoff": {
-              "estimated": "2026-06-01"
-            },
+            "cutoff": "2026-06-10",
             "publish": {
-              "estimated": "2026-06-04"
+              "when": "2026-06-10",
+              "tag": "polkadot-stable2506-12"
             },
-            "state": "planned",
+            "state": "released",
             "semver": "1.19.12"
           }
         ],