diff --git a/packages/syft/src/syft/service/dataset/dataset.py b/packages/syft/src/syft/service/dataset/dataset.py
index 9f8909d989a..2be95bd6a84 100644
--- a/packages/syft/src/syft/service/dataset/dataset.py
+++ b/packages/syft/src/syft/service/dataset/dataset.py
@@ -134,8 +134,12 @@ def _repr_html_(self) -> Any:
         else:
             private_data_obj = private_data_res.ok_value
             if isinstance(private_data_obj, ActionObject):
-                df = pd.DataFrame(self.data.syft_action_data)
-                data_table_line = itable_template_from_df(df=private_data_obj.head(5))
+                if isinstance(private_data_obj.syft_action_data, ActionDataEmpty):
+                    data_table_line = "No data"
+                else:
+                    df = pd.DataFrame(self.data.syft_action_data)
+                    data_table_line = itable_template_from_df(df=df.head(5))
+
             elif isinstance(private_data_obj, pd.DataFrame):
                 data_table_line = itable_template_from_df(df=private_data_obj.head(5))
             else:
@@ -146,8 +150,11 @@ def _repr_html_(self) -> Any:
                     data_table_line = private_data_res.ok_value
 
         if isinstance(self.mock, ActionObject):
-            df = pd.DataFrame(self.mock.syft_action_data)
-            mock_table_line = itable_template_from_df(df=df.head(5))
+            if isinstance(self.mock.syft_action_data, ActionDataEmpty):
+                mock_table_line = "No data"
+            else:
+                df = pd.DataFrame(self.mock.syft_action_data)
+                mock_table_line = itable_template_from_df(df=df.head(5))
         elif isinstance(self.mock, pd.DataFrame):
             mock_table_line = itable_template_from_df(df=self.mock.head(5))
         else:
diff --git a/packages/syft/src/syft/types/datetime.py b/packages/syft/src/syft/types/datetime.py
index afd4eb8c8dc..c78dc04f5a2 100644
--- a/packages/syft/src/syft/types/datetime.py
+++ b/packages/syft/src/syft/types/datetime.py
@@ -1,6 +1,7 @@
 # stdlib
 from datetime import datetime
 from datetime import timedelta
+from datetime import timezone
 from functools import total_ordering
 import re
 from typing import Any
@@ -33,23 +34,26 @@ class DateTime(SyftObject):
 
     @classmethod
     def now(cls) -> Self:
-        return cls(utc_timestamp=datetime.utcnow().timestamp())
+        utc_datetime = datetime.now(tz=timezone.utc)
+        return cls(utc_timestamp=utc_datetime.timestamp())
 
     @classmethod
     def from_str(cls, datetime_str: str) -> "DateTime":
-        dt = datetime.strptime(datetime_str, DATETIME_FORMAT)
-        return cls(utc_timestamp=dt.timestamp())
+        utc_datetime = datetime.strptime(datetime_str, DATETIME_FORMAT).replace(
+            tzinfo=timezone.utc
+        )
+        return cls(utc_timestamp=utc_datetime.timestamp())
 
     def __str__(self) -> str:
-        utc_datetime = datetime.utcfromtimestamp(self.utc_timestamp)
+        utc_datetime = datetime.fromtimestamp(self.utc_timestamp, tz=timezone.utc)
         return utc_datetime.strftime(DATETIME_FORMAT)
 
     def __hash__(self) -> int:
         return hash(self.utc_timestamp)
 
-    def __sub__(self, other: "DateTime") -> "DateTime":
-        res = self.utc_timestamp - other.utc_timestamp
-        return DateTime(utc_timestamp=res)
+    def __sub__(self, other: "DateTime") -> timedelta:
+        res = self.timedelta(other)
+        return res
 
     def __eq__(self, other: Any) -> bool:
         if other is None:
diff --git a/packages/syft/src/syft/types/syft_object.py b/packages/syft/src/syft/types/syft_object.py
index 97b70163ee3..5b0095d81f7 100644
--- a/packages/syft/src/syft/types/syft_object.py
+++ b/packages/syft/src/syft/types/syft_object.py
@@ -8,6 +8,8 @@
 from collections.abc import Sequence
 from collections.abc import Set
 from datetime import datetime
+from datetime import timedelta
+from datetime import timezone
 from functools import cache
 from functools import total_ordering
 from hashlib import sha256
@@ -324,18 +326,18 @@ class BaseDateTime(SyftObjectVersioned):
 
     @classmethod
     def now(cls) -> Self:
-        return cls(utc_timestamp=datetime.utcnow().timestamp())
+        return cls(utc_timestamp=datetime.now(timezone.utc).timestamp())
 
     def __str__(self) -> str:
-        utc_datetime = datetime.utcfromtimestamp(self.utc_timestamp)
+        utc_datetime = datetime.fromtimestamp(self.utc_timestamp, tz=timezone.utc)
         return utc_datetime.strftime("%Y-%m-%d %H:%M:%S")
 
     def __hash__(self) -> int:
         return hash(self.utc_timestamp)
 
-    def __sub__(self, other: Self) -> Self:
-        res = self.utc_timestamp - other.utc_timestamp
-        return BaseDateTime(utc_timestamp=res)
+    def __sub__(self, other: Self) -> timedelta:
+        res = timedelta(seconds=self.utc_timestamp - other.utc_timestamp)
+        return res
 
     def __eq__(self, other: Any) -> bool:
         if other is None: