diff --git a/src/corelibs/string_handling/timestamp_strings.py b/src/corelibs/string_handling/timestamp_strings.py
index ae3fea9..22b9b50 100644
--- a/src/corelibs/string_handling/timestamp_strings.py
+++ b/src/corelibs/string_handling/timestamp_strings.py
@@ -25,13 +25,15 @@ class TimestampStrings:
 
     def __init__(self, time_zone: str | ZoneInfo | None = None):
         self.timestamp_now = datetime.now()
-        self.time_zone = time_zone if time_zone is not None else self.TIME_ZONE
+        # set time zone as string
+        time_zone = time_zone if time_zone is not None else self.TIME_ZONE
+        self.time_zone = str(time_zone) if not isinstance(time_zone, str) else time_zone
+        # set ZoneInfo type
         try:
-            self.timestamp_now_tz = datetime.now(
-                ZoneInfo(self.time_zone) if isinstance(self.time_zone, str) else self.time_zone
-            )
+            self.time_zone_zi = ZoneInfo(self.time_zone)
         except ZoneInfoNotFoundError as e:
             raise ValueError(f'Zone could not be loaded [{self.time_zone}]: {e}') from e
+        self.timestamp_now_tz = datetime.now(self.time_zone_zi)
         self.today = self.timestamp_now.strftime('%Y-%m-%d')
         self.timestamp = self.timestamp_now.strftime("%Y-%m-%d %H:%M:%S")
         self.timestamp_tz = self.timestamp_now_tz.strftime("%Y-%m-%d %H:%M:%S %Z")
diff --git a/tests/unit/string_handling/test_timestamp_strings.py b/tests/unit/string_handling/test_timestamp_strings.py
index d9d0522..ebfabb9 100644
--- a/tests/unit/string_handling/test_timestamp_strings.py
+++ b/tests/unit/string_handling/test_timestamp_strings.py
@@ -144,8 +144,8 @@ class TestTimestampStrings:
             ts = TimestampStrings(time_zone=custom_tz_obj)
 
             # The time_zone should be the ZoneInfo object itself
-            assert ts.time_zone is custom_tz_obj
-            assert isinstance(ts.time_zone, ZoneInfo)
+            assert ts.time_zone_zi is custom_tz_obj
+            assert isinstance(ts.time_zone_zi, ZoneInfo)
 
     def test_zoneinfo_object_vs_string_equivalence(self):
         """Test that ZoneInfo object and string produce equivalent results"""
@@ -167,7 +167,7 @@ class TestTimestampStrings:
 
             # The time_zone attributes will be different types but represent the same timezone
             assert str(ts_string.time_zone) == 'Europe/Paris'
-            assert isinstance(ts_zoneinfo.time_zone, ZoneInfo)
+            assert isinstance(ts_zoneinfo.time_zone_zi, ZoneInfo)
 
     def test_edge_case_midnight(self):
         """Test timestamp formatting at midnight"""
diff --git a/uv.lock b/uv.lock
index 3753dc0..9e91ad6 100644
--- a/uv.lock
+++ b/uv.lock
@@ -53,7 +53,7 @@ wheels = [
 
 [[package]]
 name = "corelibs"
-version = "0.24.2"
+version = "0.24.3"
 source = { editable = "." }
 dependencies = [
     { name = "jmespath" },