diff --git a/dlt/common/time.py b/dlt/common/time.py
index 4ce411baa4..74c32e4ea0 100644
--- a/dlt/common/time.py
+++ b/dlt/common/time.py
@@ -164,17 +164,30 @@ def detect_datetime_format(value: str) -> Optional[str]:
         ): "%Y-%m-%dT%H:%M:%S.%fZ",  # UTC with fractional seconds
         re.compile(
             r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\+\d{2}:\d{2}$"
-        ): "%Y-%m-%dT%H:%M:%S%z",  # Timezone offset
+        ): "%Y-%m-%dT%H:%M:%S%z",  # Positive timezone offset
         re.compile(
             r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\+\d{4}$"
-        ): "%Y-%m-%dT%H:%M:%S%z",  # Timezone without colon
-        # Full datetime with fractional seconds and timezone
+        ): "%Y-%m-%dT%H:%M:%S%z",  # Positive timezone without colon
+        # Full datetime with fractional seconds and positive timezone offset
         re.compile(
             r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+\+\d{2}:\d{2}$"
         ): "%Y-%m-%dT%H:%M:%S.%f%z",
         re.compile(
             r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+\+\d{4}$"
-        ): "%Y-%m-%dT%H:%M:%S.%f%z",  # Timezone without colon
+        ): "%Y-%m-%dT%H:%M:%S.%f%z",  # Positive timezone without colon
+        re.compile(
+            r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}-\d{2}:\d{2}$"
+        ): "%Y-%m-%dT%H:%M:%S%z",  # Negative timezone offset
+        re.compile(
+            r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}-\d{4}$"
+        ): "%Y-%m-%dT%H:%M:%S%z",  # Negative timezone without colon
+        # Full datetime with fractional seconds and negative timezone offset
+        re.compile(
+            r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+-\d{2}:\d{2}$"
+        ): "%Y-%m-%dT%H:%M:%S.%f%z",
+        re.compile(
+            r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+-\d{4}$"
+        ): "%Y-%m-%dT%H:%M:%S.%f%z",  # Negative Timezone without colon
         # Datetime without timezone
         re.compile(r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}$"): "%Y-%m-%dT%H:%M:%S",  # No timezone
         re.compile(r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}$"): "%Y-%m-%dT%H:%M",  # Minute precision
diff --git a/tests/common/test_time.py b/tests/common/test_time.py
index 8c25983d46..9c7a1567e2 100644
--- a/tests/common/test_time.py
+++ b/tests/common/test_time.py
@@ -132,8 +132,26 @@ def test_datetime_to_timestamp_helpers(
     [
         ("2024-10-20T15:30:00Z", "%Y-%m-%dT%H:%M:%SZ"),  # UTC 'Z'
         ("2024-10-20T15:30:00.123456Z", "%Y-%m-%dT%H:%M:%S.%fZ"),  # UTC 'Z' with fractional seconds
-        ("2024-10-20T15:30:00+02:00", "%Y-%m-%dT%H:%M:%S%z"),  # Timezone offset
-        ("2024-10-20T15:30:00+0200", "%Y-%m-%dT%H:%M:%S%z"),  # Timezone without colon
+        ("2024-10-20T15:30:00+02:00", "%Y-%m-%dT%H:%M:%S%z"),  # Positive timezone offset
+        ("2024-10-20T15:30:00+0200", "%Y-%m-%dT%H:%M:%S%z"),  # Positive timezone offset (no colon)
+        (
+            "2024-10-20T15:30:00.123456+02:00",
+            "%Y-%m-%dT%H:%M:%S.%f%z",
+        ),  # Positive timezone offset with fractional seconds
+        (
+            "2024-10-20T15:30:00.123456+0200",
+            "%Y-%m-%dT%H:%M:%S.%f%z",
+        ),  # Positive timezone offset with fractional seconds (no colon)
+        ("2024-10-20T15:30:00-02:00", "%Y-%m-%dT%H:%M:%S%z"),  # Negative timezone offset
+        ("2024-10-20T15:30:00-0200", "%Y-%m-%dT%H:%M:%S%z"),  # Negative timezone offset (no colon)
+        (
+            "2024-10-20T15:30:00.123456-02:00",
+            "%Y-%m-%dT%H:%M:%S.%f%z",
+        ),  # Negative timezone offset with fractional seconds
+        (
+            "2024-10-20T15:30:00.123456-0200",
+            "%Y-%m-%dT%H:%M:%S.%f%z",
+        ),  # Negative timezone offset with fractional seconds (no colon)
         ("2024-10-20T15:30:00", "%Y-%m-%dT%H:%M:%S"),  # No timezone
         ("2024-10-20T15:30", "%Y-%m-%dT%H:%M"),  # Minute precision
         ("2024-10-20T15", "%Y-%m-%dT%H"),  # Hour precision