diff --git a/packages/string-templates/scripts/gen-collection-info.ts b/packages/string-templates/scripts/gen-collection-info.ts
index d231908a05..406c2959a5 100644
--- a/packages/string-templates/scripts/gen-collection-info.ts
+++ b/packages/string-templates/scripts/gen-collection-info.ts
@@ -44,6 +44,13 @@ const ADDED_HELPERS = {
       description:
         "Produce a humanized duration left/until given an amount of time and the type of time measurement.",
     },
+    difference: {
+      args: ["from", "to", "[unitType=ms]"],
+      example:
+        '{{ difference "2025-09-30" "2025-06-17" "seconds" }} -> 9072000',
+      description:
+        "Gets the difference between two dates, in milliseconds. Pass a third parameter to adjust the unit measurement.",
+    },
   },
 }
 
diff --git a/packages/string-templates/src/manifest.json b/packages/string-templates/src/manifest.json
index e399dbff94..7b6ac7aca0 100644
--- a/packages/string-templates/src/manifest.json
+++ b/packages/string-templates/src/manifest.json
@@ -1222,6 +1222,15 @@
       ],
       "example": "{{duration 8 \"seconds\"}} -> a few seconds",
       "description": "<p>Produce a humanized duration left/until given an amount of time and the type of time measurement.</p>\n"
+    },
+    "difference": {
+      "args": [
+        "from",
+        "to",
+        "[unitType=ms]"
+      ],
+      "example": "{{ difference \"2025-09-30\" \"2025-06-17\" \"seconds\" }} -> 9072000",
+      "description": "<p>Gets the difference between two dates, in milliseconds. Pass a third parameter to adjust the unit measurement.</p>\n"
     }
   }
 }
\ No newline at end of file