diff --git a/src/lib/utils/index.ts b/src/lib/utils/index.ts
index 4fb76d0..33359b7 100644
--- a/src/lib/utils/index.ts
+++ b/src/lib/utils/index.ts
@@ -1 +1,2 @@
 export * from './convert-enum.util'
+export * from './timestamp-to-iso.util'
diff --git a/src/lib/utils/timestamp-to-iso.util.ts b/src/lib/utils/timestamp-to-iso.util.ts
new file mode 100644
index 0000000..54146f2
--- /dev/null
+++ b/src/lib/utils/timestamp-to-iso.util.ts
@@ -0,0 +1,5 @@
+import { Timestamp } from '@teacinema/contracts/gen/ts/google/protobuf/timestamp'
+
+export function timestampToISO(ts: Timestamp) {
+  new Date(ts.seconds * 1000 + ts.nanos / 1_000_000).toISOString()
+}