diff --git a/litellm/integrations/opik/opik.py b/litellm/integrations/opik/opik.py
index 8cbfb9e653..9f90d2384d 100644
--- a/litellm/integrations/opik/opik.py
+++ b/litellm/integrations/opik/opik.py
@@ -3,6 +3,7 @@ Opik Logger that logs LLM events to an Opik server
 """
 
 import asyncio
+from datetime import timezone
 import json
 import traceback
 from typing import Dict, List
@@ -291,8 +292,8 @@ class OpikLogger(CustomBatchLogger):
                     "project_name": project_name,
                     "id": trace_id,
                     "name": trace_name,
-                    "start_time": start_time.isoformat() + "Z",
-                    "end_time": end_time.isoformat() + "Z",
+                    "start_time": start_time.astimezone(timezone.utc).isoformat().replace("+00:00", "Z"),
+                    "end_time": end_time.astimezone(timezone.utc).isoformat().replace("+00:00", "Z"),
                     "input": input_data,
                     "output": output_data,
                     "metadata": metadata,
@@ -312,8 +313,8 @@ class OpikLogger(CustomBatchLogger):
                 "parent_span_id": parent_span_id,
                 "name": span_name,
                 "type": "llm",
-                "start_time": start_time.isoformat() + "Z",
-                "end_time": end_time.isoformat() + "Z",
+                "start_time": start_time.astimezone(timezone.utc).isoformat().replace("+00:00", "Z"),
+                "end_time": end_time.astimezone(timezone.utc).isoformat().replace("+00:00", "Z"),
                 "input": input_data,
                 "output": output_data,
                 "metadata": metadata,