diff --git a/services/kms/src/stackit/kms/models/create_key_payload.py b/services/kms/src/stackit/kms/models/create_key_payload.py
index 8b922067a..25981ef1b 100644
--- a/services/kms/src/stackit/kms/models/create_key_payload.py
+++ b/services/kms/src/stackit/kms/models/create_key_payload.py
@@ -17,7 +17,13 @@
 import pprint
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBool, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBool,
+    StrictStr,
+)
 from typing_extensions import Annotated, Self
 
 from stackit.kms.models.access_scope import AccessScope
diff --git a/services/kms/src/stackit/kms/models/decrypt_payload.py b/services/kms/src/stackit/kms/models/decrypt_payload.py
index d9e2256fe..53d97f0b7 100644
--- a/services/kms/src/stackit/kms/models/decrypt_payload.py
+++ b/services/kms/src/stackit/kms/models/decrypt_payload.py
@@ -17,7 +17,13 @@
 import pprint
 from typing import Any, ClassVar, Dict, List, Optional, Set, Union
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBytes, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBytes,
+    StrictStr,
+)
 from typing_extensions import Self
 
 
diff --git a/services/kms/src/stackit/kms/models/decrypted_data.py b/services/kms/src/stackit/kms/models/decrypted_data.py
index 372a94c43..3d6099f2d 100644
--- a/services/kms/src/stackit/kms/models/decrypted_data.py
+++ b/services/kms/src/stackit/kms/models/decrypted_data.py
@@ -17,7 +17,13 @@
 import pprint
 from typing import Any, ClassVar, Dict, List, Optional, Set, Union
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBytes, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBytes,
+    StrictStr,
+)
 from typing_extensions import Self
 
 
diff --git a/services/kms/src/stackit/kms/models/encrypt_payload.py b/services/kms/src/stackit/kms/models/encrypt_payload.py
index 879b357dc..43574df1a 100644
--- a/services/kms/src/stackit/kms/models/encrypt_payload.py
+++ b/services/kms/src/stackit/kms/models/encrypt_payload.py
@@ -17,7 +17,13 @@
 import pprint
 from typing import Any, ClassVar, Dict, List, Optional, Set, Union
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBytes, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBytes,
+    StrictStr,
+)
 from typing_extensions import Self
 
 
diff --git a/services/kms/src/stackit/kms/models/encrypted_data.py b/services/kms/src/stackit/kms/models/encrypted_data.py
index 3cf913e67..f7e1122dc 100644
--- a/services/kms/src/stackit/kms/models/encrypted_data.py
+++ b/services/kms/src/stackit/kms/models/encrypted_data.py
@@ -17,7 +17,13 @@
 import pprint
 from typing import Any, ClassVar, Dict, List, Optional, Set, Union
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBytes, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBytes,
+    StrictStr,
+)
 from typing_extensions import Self
 
 
diff --git a/services/kms/src/stackit/kms/models/key.py b/services/kms/src/stackit/kms/models/key.py
index 917c7d7c6..d84f61725 100644
--- a/services/kms/src/stackit/kms/models/key.py
+++ b/services/kms/src/stackit/kms/models/key.py
@@ -15,6 +15,7 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
@@ -80,6 +81,32 @@ class Key(BaseModel):
         "state",
     ]
 
+    @field_validator("created_at", mode="before")
+    def created_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
+    @field_validator("deletion_date", mode="before")
+    def deletion_date_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     @field_validator("state")
     def state_validate_enum(cls, value):
         """Validates the enum"""
diff --git a/services/kms/src/stackit/kms/models/key_ring.py b/services/kms/src/stackit/kms/models/key_ring.py
index a5f062a21..8d1d1f9bb 100644
--- a/services/kms/src/stackit/kms/models/key_ring.py
+++ b/services/kms/src/stackit/kms/models/key_ring.py
@@ -15,6 +15,7 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
@@ -40,6 +41,19 @@ class KeyRing(BaseModel):
     state: StrictStr = Field(description="The current state of the key ring.")
     __properties: ClassVar[List[str]] = ["createdAt", "description", "displayName", "id", "state"]
 
+    @field_validator("created_at", mode="before")
+    def created_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     @field_validator("state")
     def state_validate_enum(cls, value):
         """Validates the enum"""
diff --git a/services/kms/src/stackit/kms/models/sign_payload.py b/services/kms/src/stackit/kms/models/sign_payload.py
index 893e1f839..af0a3759d 100644
--- a/services/kms/src/stackit/kms/models/sign_payload.py
+++ b/services/kms/src/stackit/kms/models/sign_payload.py
@@ -17,7 +17,13 @@
 import pprint
 from typing import Any, ClassVar, Dict, List, Optional, Set, Union
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBytes, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBytes,
+    StrictStr,
+)
 from typing_extensions import Self
 
 
diff --git a/services/kms/src/stackit/kms/models/signed_data.py b/services/kms/src/stackit/kms/models/signed_data.py
index f80d3c400..5670c82d4 100644
--- a/services/kms/src/stackit/kms/models/signed_data.py
+++ b/services/kms/src/stackit/kms/models/signed_data.py
@@ -17,7 +17,13 @@
 import pprint
 from typing import Any, ClassVar, Dict, List, Optional, Set, Union
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBytes, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBytes,
+    StrictStr,
+)
 from typing_extensions import Self
 
 
diff --git a/services/kms/src/stackit/kms/models/verify_payload.py b/services/kms/src/stackit/kms/models/verify_payload.py
index 72ce7d3db..9aaaa3150 100644
--- a/services/kms/src/stackit/kms/models/verify_payload.py
+++ b/services/kms/src/stackit/kms/models/verify_payload.py
@@ -17,7 +17,13 @@
 import pprint
 from typing import Any, ClassVar, Dict, List, Optional, Set, Union
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBytes, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBytes,
+    StrictStr,
+)
 from typing_extensions import Self
 
 
diff --git a/services/kms/src/stackit/kms/models/version.py b/services/kms/src/stackit/kms/models/version.py
index 329702db3..93fb87d5e 100644
--- a/services/kms/src/stackit/kms/models/version.py
+++ b/services/kms/src/stackit/kms/models/version.py
@@ -15,6 +15,7 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
@@ -66,6 +67,32 @@ class Version(BaseModel):
         "state",
     ]
 
+    @field_validator("created_at", mode="before")
+    def created_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
+    @field_validator("destroy_date", mode="before")
+    def destroy_date_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     @field_validator("state")
     def state_validate_enum(cls, value):
         """Validates the enum"""
diff --git a/services/kms/src/stackit/kms/models/wrapping_key.py b/services/kms/src/stackit/kms/models/wrapping_key.py
index e3abf0a48..422ead663 100644
--- a/services/kms/src/stackit/kms/models/wrapping_key.py
+++ b/services/kms/src/stackit/kms/models/wrapping_key.py
@@ -15,6 +15,7 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
@@ -69,6 +70,32 @@ class WrappingKey(BaseModel):
         "state",
     ]
 
+    @field_validator("created_at", mode="before")
+    def created_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
+    @field_validator("expires_at", mode="before")
+    def expires_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     @field_validator("state")
     def state_validate_enum(cls, value):
         """Validates the enum"""