diff --git a/TELEMETRY.md b/TELEMETRY.md
new file mode 100644
index 0000000..99cfaa4
--- /dev/null
+++ b/TELEMETRY.md
@@ -0,0 +1,8 @@
+# Telemetry Disclosure
+
+This package supports opt-in anonymous usage telemetry via [`@acamarata/telemetry`](https://github.com/acamarata/telemetry).
+
+Telemetry is **off by default**. No data is sent unless you set `ACAMARATA_TELEMETRY=1`.
+
+Full disclosure (what is sent, where it goes, how to disable):
+[github.com/acamarata/telemetry/blob/main/TELEMETRY.md](https://github.com/acamarata/telemetry/blob/main/TELEMETRY.md)
diff --git a/package.json b/package.json
index 76980e4..fdc4eab 100644
--- a/package.json
+++ b/package.json
@@ -61,6 +61,7 @@
   "devDependencies": {
     "@acamarata/eslint-config": "^0.1.0",
     "@acamarata/prettier-config": "^0.1.0",
+    "@acamarata/telemetry": "^0.1.0",
     "@acamarata/tsconfig": "^0.1.0",
     "@eslint/js": "^10.0.1",
     "@types/node": "^25.3.5",
diff --git a/src/index.ts b/src/index.ts
index 473d381..9269378 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -303,3 +303,14 @@ export type { CalendarEngine } from "hijri-core";
  * listCalendars(); // ['uaq', 'fcna', 'my-cal']
  */
 export { registerCalendar, getCalendar, listCalendars } from "hijri-core";
+
+// ── Opt-in anonymous telemetry ────────────────────────────────────────────────
+// Off by default. Enable: ACAMARATA_TELEMETRY=1
+// What is sent + how to disable: https://github.com/acamarata/telemetry/blob/main/TELEMETRY.md
+import('@acamarata/telemetry')
+  .then(({ track }) =>
+    track('load', { package: 'dayjs-hijri-plus', version: '1.0.4' }),
+  )
+  .catch(() => {
+    // telemetry not installed or disabled — that's fine
+  });