Fixes #10809: Permit nullifying site time_zone via REST API

docs/release-notes/version-3.3.md

@@ -8,6 +8,7 @@
 * [#10770](https://github.com/netbox-community/netbox/issues/10282) - Fix social authentication for new users
 * [#10791](https://github.com/netbox-community/netbox/issues/10791) - Permit nullifying VLAN group `scope_type` via REST API
 * [#10803](https://github.com/netbox-community/netbox/issues/10803) - Fix exception when ordering contacts by number of assignments
+* [#10809](https://github.com/netbox-community/netbox/issues/10809) - Permit nullifying site `time_zone` via REST API
 
 ---
 

netbox/dcim/api/serializers.py

@@ -130,7 +130,7 @@ class SiteSerializer(NetBoxModelSerializer):
     region = NestedRegionSerializer(required=False, allow_null=True)
     group = NestedSiteGroupSerializer(required=False, allow_null=True)
     tenant = NestedTenantSerializer(required=False, allow_null=True)
-    time_zone = TimeZoneSerializerField(required=False)
+    time_zone = TimeZoneSerializerField(required=False, allow_null=True)
     asns = SerializedPKRelatedField(
         queryset=ASN.objects.all(),
         serializer=NestedASNSerializer,