diff --git a/blog/2022-01-24-workflows-part-I.md b/blog/2022-01-24-workflows-part-I.md
index 908cb4863b..49c0db0f89 100644
--- a/blog/2022-01-24-workflows-part-I.md
+++ b/blog/2022-01-24-workflows-part-I.md
@@ -97,7 +97,7 @@ function SendReminderEmail(event, context) : Message {
 
   return {
     message: { user: event.user, iter: event.iter + 1},
-    after: "1month"
+    after: "30 days"
   }
 }
 
@@ -132,7 +132,7 @@ async function SendReminderEmail(user: string) {
         // Thanks to Temporal's retry policy, we already 
         // tried twice, better luck next month 🍀
       }
-      await sleep("1 month");
+      await sleep("30 days");
     }
 }
 ```
diff --git a/docs/typescript/workflows.md b/docs/typescript/workflows.md
index 8ece65783a..1d85032174 100644
--- a/docs/typescript/workflows.md
+++ b/docs/typescript/workflows.md
@@ -518,6 +518,10 @@ await sleep(30 * 24 * 60 * 60 * 1000); // numerical API
 await sleep('30 days').catch(() => {
   // clean up code if workflow is canceled during sleep
 });
+  
+// NOT VALID
+await sleep('1 month'); // ms package doesnt support "months" https://github.com/vercel/ms/issues/57
+// use date-fns and sleepUntil instead, see below
 ```
 
 With this primitive, you can build other abstractions. For example, a `sleepUntil` function that converts absolute time to relative time with `date-fns`: