diff --git a/src/backend/src/routers/whoami.js b/src/backend/src/routers/whoami.js
index d58591ffd..9898fc03e 100644
--- a/src/backend/src/routers/whoami.js
+++ b/src/backend/src/routers/whoami.js
@@ -55,6 +55,26 @@ const whoami_common = ({ is_user, user }) => {
         }
     }
 
+    if(user.last_activity_ts){
+        let dateString = user.last_activity_ts;
+
+        // Replace the space with 'T' to make it ISO 8601 compliant
+        const isoString = dateString.replace(' ', 'T');
+
+        // Create a Date object and get the epoch timestamp
+        let epoch;
+        try{
+            epoch = new Date(isoString).getTime() / 1000;
+            // round to 1 decimal place
+            epoch = Math.round(epoch);
+        }catch(e){
+            console.error('Error parsing last_activity_ts', e);
+        }
+
+        // add last_activity_ts
+        details.last_activity_ts = epoch;
+    }
+
     return details;
 };