diff --git a/dist/lib/draft/index.d.ts b/dist/lib/draft/index.d.ts
index 6e50b5f..2fbd0a9 100644
--- a/dist/lib/draft/index.d.ts
+++ b/dist/lib/draft/index.d.ts
@@ -83,7 +83,7 @@ export declare class Draft {
      */
     each(data: any, callback: EachCallback, schema?: JsonSchema, pointer?: JsonPointer): void;
     eachSchema(callback: EachSchemaCallback, schema?: JsonSchema): void;
-    getChildSchemaSelection(property: string | number, schema?: JsonSchema): JsonSchema[] | JsonError;
+    getChildSchemaSelection(property: string | number, schema?: JsonSchema): JsonError | JsonSchema[];
     /**
      * Returns the json-schema of a data-json-pointer.
      *
diff --git a/dist/module/lib/validation/format.js b/dist/module/lib/validation/format.js
index 2b584c7..60357d1 100644
--- a/dist/module/lib/validation/format.js
+++ b/dist/module/lib/validation/format.js
@@ -1,15 +1,10 @@
 import validUrl from "valid-url";
 import { parse as parseIdnEmail } from "smtp-address-parser";
 import getTypeOf from "../getTypeOf";
-// referenced
-// https://github.com/cfworker/cfworker/blob/main/packages/json-schema/src/format.ts
-// https://gist.github.com/marcelotmelo/b67f58a08bee6c2468f8
-const isValidDateTime = new RegExp("^([0-9]+)-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])[Tt]([01][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9]|60)(\\.[0-9]+)?(([Zz])|([\\+|\\-]([01][0-9]|2[0-3]):[0-5][0-9]))$");
 const isValidIPV4 = /^(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)$/;
 const isValidIPV6 = /^((([0-9a-f]{1,4}:){7}([0-9a-f]{1,4}|:))|(([0-9a-f]{1,4}:){6}(:[0-9a-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9a-f]{1,4}:){5}(((:[0-9a-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9a-f]{1,4}:){4}(((:[0-9a-f]{1,4}){1,3})|((:[0-9a-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9a-f]{1,4}:){3}(((:[0-9a-f]{1,4}){1,4})|((:[0-9a-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9a-f]{1,4}:){2}(((:[0-9a-f]{1,4}){1,5})|((:[0-9a-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9a-f]{1,4}:){1}(((:[0-9a-f]{1,4}){1,6})|((:[0-9a-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9a-f]{1,4}){1,7})|((:[0-9a-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))$/i;
 const isValidHostname = /^(?=.{1,255}$)[0-9A-Za-z](?:(?:[0-9A-Za-z]|-){0,61}[0-9A-Za-z])?(?:\.[0-9A-Za-z](?:(?:[0-9A-Za-z]|-){0,61}[0-9A-Za-z])?)*\.?$/;
 const matchDate = /^(\d\d\d\d)-(\d\d)-(\d\d)$/;
-// const matchTime = /^(\d\d):(\d\d):(\d\d)(\.\d+)?(z|[+-]\d\d(?::?\d\d)?)?$/i;
 const matchTime = /^(?<time>(?:([0-1]\d|2[0-3]):[0-5]\d:(?<second>[0-5]\d|60)))(?:\.\d+)?(?<offset>(?:z|[+-]([0-1]\d|2[0-3])(?::?[0-5]\d)?))$/i;
 const DAYS = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
 const isValidJsonPointer = /^(?:\/(?:[^~/]|~0|~1)*)*$/;
diff --git a/lib/validation/format.ts b/lib/validation/format.ts
index 90292db..a3d84e2 100644
--- a/lib/validation/format.ts
+++ b/lib/validation/format.ts
@@ -5,21 +5,12 @@ import { parse as parseIdnEmail } from "smtp-address-parser";
 import getTypeOf from "../getTypeOf";
 import { SchemaNode } from "../schemaNode";
 
-// referenced
-// https://github.com/cfworker/cfworker/blob/main/packages/json-schema/src/format.ts
-
-// https://gist.github.com/marcelotmelo/b67f58a08bee6c2468f8
-const isValidDateTime = new RegExp(
-    "^([0-9]+)-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])[Tt]([01][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9]|60)(\\.[0-9]+)?(([Zz])|([\\+|\\-]([01][0-9]|2[0-3]):[0-5][0-9]))$"
-);
 const isValidIPV4 = /^(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)$/;
 const isValidIPV6 =
     /^((([0-9a-f]{1,4}:){7}([0-9a-f]{1,4}|:))|(([0-9a-f]{1,4}:){6}(:[0-9a-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9a-f]{1,4}:){5}(((:[0-9a-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9a-f]{1,4}:){4}(((:[0-9a-f]{1,4}){1,3})|((:[0-9a-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9a-f]{1,4}:){3}(((:[0-9a-f]{1,4}){1,4})|((:[0-9a-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9a-f]{1,4}:){2}(((:[0-9a-f]{1,4}){1,5})|((:[0-9a-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9a-f]{1,4}:){1}(((:[0-9a-f]{1,4}){1,6})|((:[0-9a-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9a-f]{1,4}){1,7})|((:[0-9a-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))$/i;
 const isValidHostname =
     /^(?=.{1,255}$)[0-9A-Za-z](?:(?:[0-9A-Za-z]|-){0,61}[0-9A-Za-z])?(?:\.[0-9A-Za-z](?:(?:[0-9A-Za-z]|-){0,61}[0-9A-Za-z])?)*\.?$/;
 const matchDate = /^(\d\d\d\d)-(\d\d)-(\d\d)$/;
-
-// const matchTime = /^(\d\d):(\d\d):(\d\d)(\.\d+)?(z|[+-]\d\d(?::?\d\d)?)?$/i;
 const matchTime =
     /^(?<time>(?:([0-1]\d|2[0-3]):[0-5]\d:(?<second>[0-5]\d|60)))(?:\.\d+)?(?<offset>(?:z|[+-]([0-1]\d|2[0-3])(?::?[0-5]\d)?))$/i;
 const DAYS = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
diff --git a/test/unit/validate.format.test.ts b/test/unit/validate.format.test.ts
index aad326f..84222ae 100644
--- a/test/unit/validate.format.test.ts
+++ b/test/unit/validate.format.test.ts
@@ -5,7 +5,11 @@ import { Draft04 } from "../../lib/draft04";
 import { JsonSchema } from "../../lib/types";
 import { strict as assert } from "assert";
 
-function validate(draft: Draft, value: unknown, schema: JsonSchema = draft.getSchema() as JsonSchema) {
+function validate(
+    draft: Draft,
+    value: unknown,
+    schema: JsonSchema = draft.getSchema() as JsonSchema
+) {
     return _validate(createNode(draft, schema), value);
 }
 
@@ -14,22 +18,6 @@ describe("validate format", () => {
     before(() => (draft = new Draft04()));
 
     describe("time", () => {
-        it("should validate HH:mm:ss", () => {
-            const errors = validate(draft, "15:31:12", {
-                type: "string",
-                format: "time"
-            });
-            assert.deepEqual(errors, []);
-        });
-
-        it("should validate HH:mm:ss.s", () => {
-            const errors = validate(draft, "15:31:12.99", {
-                type: "string",
-                format: "time"
-            });
-            assert.deepEqual(errors, []);
-        });
-
         it("should validate HH:mm:ss-HH:mm", () => {
             const errors = validate(draft, "15:31:12-02:30", {
                 type: "string",