diff --git a/data_cube_utilities/data_access_api.py b/data_cube_utilities/data_access_api.py
index 6a6f152c..219d2a83 100644
--- a/data_cube_utilities/data_access_api.py
+++ b/data_cube_utilities/data_access_api.py
@@ -24,6 +24,7 @@
 from datacube.api import GridWorkflow
 import xarray as xr
 import numpy as np
+import datetime
 from datetime import date
 
 
@@ -260,7 +261,10 @@ def list_combined_acquisition_dates(self,
             if not dataset:
                 continue
 
-            dates += dataset.time.values.astype('M8[ms]').tolist()
+            #dates += dataset.time.values.astype('M8[ms]').tolist()
+            dates += [ datetime.datetime.utcfromtimestamp(
+                (dt - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 's') )
+                for dt in dataset.time.values ]
 
         return dates