1 files changed, 32 insertions, 23 deletions
diff --git a/pendulum/tz/exceptions.py b/pendulum/tz/exceptions.py
index d1572f9..b8833ac 100644
--- a/pendulum/tz/exceptions.py
+++ b/pendulum/tz/exceptions.py
@@ -1,23 +1,32 @@
-class TimezoneError(ValueError):
-
-    pass
-
-
-class NonExistingTime(TimezoneError):
-
-    message = "The datetime {} does not exist."
-
-    def __init__(self, dt):
-        message = self.message.format(dt)
-
-        super(NonExistingTime, self).__init__(message)
-
-
-class AmbiguousTime(TimezoneError):
-
-    message = "The datetime {} is ambiguous."
-
-    def __init__(self, dt):
-        message = self.message.format(dt)
-
-        super(AmbiguousTime, self).__init__(message)
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from datetime import datetime
+
+
+class TimezoneError(ValueError):
+    pass
+
+
+class InvalidTimezone(TimezoneError):
+    pass
+
+
+class NonExistingTime(TimezoneError):
+    message = "The datetime {} does not exist."
+
+    def __init__(self, dt: datetime) -> None:
+        message = self.message.format(dt)
+
+        super().__init__(message)
+
+
+class AmbiguousTime(TimezoneError):
+    message = "The datetime {} is ambiguous."
+
+    def __init__(self, dt: datetime) -> None:
+        message = self.message.format(dt)
+
+        super().__init__(message)