diff --git a/src/corelibs/string_handling/timestamp_strings.py b/src/corelibs/string_handling/timestamp_strings.py
index f1ca7a1..68346de 100644
--- a/src/corelibs/string_handling/timestamp_strings.py
+++ b/src/corelibs/string_handling/timestamp_strings.py
@@ -23,11 +23,13 @@ class TimestampStrings:
 
     TIME_ZONE: str = 'Asia/Tokyo'
 
-    def __init__(self, time_zone: str | None = None):
+    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
         try:
-            self.timestamp_now_tz = datetime.now(ZoneInfo(self.time_zone))
+            self.timestamp_now_tz = datetime.now(
+                ZoneInfo(self.time_zone) if not isinstance(self.time_zone, ZoneInfo) else self.time_zone
+            )
         except ZoneInfoNotFoundError as e:
             raise ValueError(f'Zone could not be loaded [{self.time_zone}]: {e}') from e
         self.today = self.timestamp_now.strftime('%Y-%m-%d')
diff --git a/test-run/config_handling/config/settings.ini b/test-run/config_handling/config/settings.ini
index 4417a95..69efe5e 100644
--- a/test-run/config_handling/config/settings.ini
+++ b/test-run/config_handling/config/settings.ini
@@ -24,6 +24,7 @@ match_source_list=foo,bar
 element_a=Static energy
 element_b=123.5
 element_c=True
+elemend_d=AB:CD;EF
 email=foo@bar.com,other+bar-fee@domain-com.cp,
 email_not_mandatory=
 email_bad=gii@bar.com
diff --git a/test-run/timestamp_strings/timestamp_strings.py b/test-run/timestamp_strings/timestamp_strings.py
index 127a5df..dcf8109 100644
--- a/test-run/timestamp_strings/timestamp_strings.py
+++ b/test-run/timestamp_strings/timestamp_strings.py
@@ -4,10 +4,12 @@
 Test for double byte format
 """
 
+from zoneinfo import ZoneInfo
 from corelibs.string_handling.timestamp_strings import TimestampStrings
 
 
 def main():
+    """test"""
     ts = TimestampStrings()
     print(f"TS: {ts.timestamp_now}")
 
@@ -16,6 +18,11 @@ def main():
     except ValueError as e:
         print(f"Value error: {e}")
 
+    ts = TimestampStrings("Europe/Vienna")
+    print(f"TZ: {ts.time_zone} -> TS: {ts.timestamp_now_tz}")
+    ts = TimestampStrings(ZoneInfo("Europe/Vienna"))
+    print(f"TZ: {ts.time_zone} -> TS: {ts.timestamp_now_tz}")
+
 
 if __name__ == "__main__":
     main()
diff --git a/uv.lock b/uv.lock
index eb74d11..bc1d46b 100644
--- a/uv.lock
+++ b/uv.lock
@@ -53,7 +53,7 @@ wheels = [
 
 [[package]]
 name = "corelibs"
-version = "0.23.0"
+version = "0.24.1"
 source = { editable = "." }
 dependencies = [
     { name = "jmespath" },