diff --git a/packages/core/lib/event.dart b/packages/core/lib/event.dart
index 63b8973..50f7ba3 100644
--- a/packages/core/lib/event.dart
+++ b/packages/core/lib/event.dart
@@ -577,7 +577,7 @@ mixin JSONExtendable {
 
 void applyRawEventData(RawEvent event) {
   event.messageId ??= const Uuid().v4();
-  event.timestamp ??= DateTime.now().toIso8601String();
+  event.timestamp ??= DateTime.now().toUtc().toIso8601String();
 }
 
 UserTraits mergeUserTraits(UserTraits a, UserTraits b) {