diff --git a/lib/cartodb/models/aggregation/time-dimension.js b/lib/cartodb/models/aggregation/time-dimension.js
index 6d1fe635..898f6a82 100644
--- a/lib/cartodb/models/aggregation/time-dimension.js
+++ b/lib/cartodb/models/aggregation/time-dimension.js
@@ -129,9 +129,9 @@ function serialSqlExpr(params) {
 }
 
 const isoParts = {
-    second: `to_char($t, 'YYYY-MM-DD"T"HH:MI:SS')`,
-    minute: `to_char($t, 'YYYY-MM-DD"T"HH:MI')`,
-    hour: `to_char($t, 'YYYY-MM-DD"T"HH')`,
+    second: `to_char($t, 'YYYY-MM-DD"T"HH24:MI:SS')`,
+    minute: `to_char($t, 'YYYY-MM-DD"T"HH24:MI')`,
+    hour: `to_char($t, 'YYYY-MM-DD"T"HH24')`,
     day: `to_char($t, 'YYYY-MM-DD')`,
     month: `to_char($t, 'YYYY-MM')`,
     year: `to_char($t, 'YYYY')`,