diff --git a/.changeset/moody-fans-try.md b/.changeset/moody-fans-try.md
new file mode 100644
index 000000000..f6920a629
--- /dev/null
+++ b/.changeset/moody-fans-try.md
@@ -0,0 +1,5 @@
+---
+'mermaid': patch
+---
+
+fix: Resolve gantt chart crash due to invalid array length
diff --git a/.github/workflows/e2e-timings.yml b/.github/workflows/e2e-timings.yml
index 21dbda293..635253bc8 100644
--- a/.github/workflows/e2e-timings.yml
+++ b/.github/workflows/e2e-timings.yml
@@ -58,7 +58,7 @@ jobs:
           echo "EOF" >> $GITHUB_OUTPUT
 
       - name: Commit and create pull request
-        uses: peter-evans/create-pull-request@18e469570b1cf0dfc11d60ec121099f8ff3e617a
+        uses: peter-evans/create-pull-request@915d841dae6a4f191bb78faf61a257411d7be4d2
         with:
           add-paths: |
             cypress/timings.json
diff --git a/cypress/integration/rendering/gantt.spec.js b/cypress/integration/rendering/gantt.spec.js
index 32dbcb4d9..72cb6ea29 100644
--- a/cypress/integration/rendering/gantt.spec.js
+++ b/cypress/integration/rendering/gantt.spec.js
@@ -803,4 +803,34 @@ describe('Gantt diagram', () => {
       {}
     );
   });
+  it('should handle numeric timestamps with dateFormat x', () => {
+    imgSnapshotTest(
+      `
+     gantt
+     title Process time profile (ms)
+     dateFormat x
+     axisFormat %L
+     tickInterval 250millisecond
+
+     section Pipeline
+     Parse JSON p1: 000, 120
+    `,
+      {}
+    );
+  });
+  it('should handle numeric timestamps with dateFormat X', () => {
+    imgSnapshotTest(
+      `
+     gantt
+     title Process time profile (ms)
+     dateFormat X
+     axisFormat %L
+     tickInterval 250millisecond
+
+     section Pipeline
+     Parse JSON p1: 000, 120
+    `,
+      {}
+    );
+  });
 });
diff --git a/packages/examples/package.json b/packages/examples/package.json
index cd0fc0bd0..10f66c2b9 100644
--- a/packages/examples/package.json
+++ b/packages/examples/package.json
@@ -3,6 +3,7 @@
   "version": "1.0.0",
   "description": "Mermaid examples package",
   "author": "Sidharth Vinod",
+  "license": "MIT",
   "type": "module",
   "module": "./dist/mermaid-examples.core.mjs",
   "types": "./dist/mermaid.d.ts",
diff --git a/packages/mermaid/src/diagrams/gantt/ganttDb.js b/packages/mermaid/src/diagrams/gantt/ganttDb.js
index b2b5b0566..b1b2052c1 100644
--- a/packages/mermaid/src/diagrams/gantt/ganttDb.js
+++ b/packages/mermaid/src/diagrams/gantt/ganttDb.js
@@ -268,7 +268,9 @@ const fixTaskDates = function (startTime, endTime, dateFormat, excludes, include
 
 const getStartDate = function (prevTime, dateFormat, str) {
   str = str.trim();
-
+  if ((dateFormat.trim() === 'x' || dateFormat.trim() === 'X') && /^\d+$/.test(str)) {
+    return new Date(Number(str));
+  }
   // Test for after
   const afterRePattern = /^after\s+(?<ids>[\d\w- ]+)/;
   const afterStatement = afterRePattern.exec(str);