diff --git a/src/openflexure_microscope_server/things/camera/simulation.py b/src/openflexure_microscope_server/things/camera/simulation.py
index e5fe90c1..4c71ed39 100644
--- a/src/openflexure_microscope_server/things/camera/simulation.py
+++ b/src/openflexure_microscope_server/things/camera/simulation.py
@@ -12,6 +12,7 @@ import io
 import logging
 import re
 import time
+from datetime import datetime
 from threading import Thread
 from types import TracebackType
 from typing import Optional, Self, overload
@@ -467,9 +468,10 @@ class SimulatedCamera(BaseCamera):
             last_frame_t = time.time()
 
             frame = self.generate_frame()
-            self.mjpeg_stream.add_frame(_frame2bytes(frame))
+            timestamp = datetime.fromtimestamp(last_frame_t)
+            self.mjpeg_stream.add_frame(_frame2bytes(frame), timestamp)
             ds_frame = frame.resize((320, 240), resample=Image.Resampling.NEAREST)
-            self.lores_mjpeg_stream.add_frame(_frame2bytes(ds_frame))
+            self.lores_mjpeg_stream.add_frame(_frame2bytes(ds_frame), timestamp)
 
     @lt.action
     def discard_frames(self) -> None: