diff --git a/src/NJsonSchema.Tests/Validation/SchemaTests.cs b/src/NJsonSchema.Tests/Validation/SchemaTests.cs
index d16e59279..cc2b3227d 100644
--- a/src/NJsonSchema.Tests/Validation/SchemaTests.cs
+++ b/src/NJsonSchema.Tests/Validation/SchemaTests.cs
@@ -379,5 +379,37 @@ public async Task When_multiple_types_fail_with_errors_take_the_best_group()
             Assert.Equal(1, errors.Count);
             Assert.Contains(errors, e => e.Kind == ValidationErrorKind.NoTypeValidates);
         }
+
+        [Fact]
+        public async Task When_datetime_with_regex_validation_then_datetime_is_not_altered()
+        {
+            //// Arrange
+            var schemaJson = @"
+            {
+              ""$schema"": ""http://json-schema.org/draft-07/schema#"",
+              ""type"": ""object"",
+              ""required"": [
+                ""my_datetime""
+              ],
+              ""properties"": {
+                ""my_datetime"": {
+                  ""type"": ""string"",
+                  ""pattern"": ""^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}\\.\\d{3}Z$""
+                }
+              }
+            }";
+
+            var json = @"
+            {
+              ""my_datetime"": ""2018-12-19T16:58:07.270Z""
+            }";
+
+            //// Act
+            var schema = await JsonSchema4.FromJsonAsync(schemaJson);
+            var errors = schema.Validate(json);
+
+            //// Assert
+            Assert.Equal(0, errors.Count);
+        }
     }
 }
diff --git a/src/NJsonSchema/Validation/JsonSchemaValidator.cs b/src/NJsonSchema/Validation/JsonSchemaValidator.cs
index 3f78cb2cd..fa8b724fc 100644
--- a/src/NJsonSchema/Validation/JsonSchemaValidator.cs
+++ b/src/NJsonSchema/Validation/JsonSchemaValidator.cs
@@ -8,6 +8,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Text.RegularExpressions;
 using Newtonsoft.Json;
@@ -52,8 +53,15 @@ public JsonSchemaValidator()
         /// <returns>The list of validation errors.</returns>
         public ICollection<ValidationError> Validate(string jsonData, JsonSchema4 schema)
         {
-            var jsonObject = JToken.Parse(jsonData);
-            return Validate(jsonObject, schema);
+            using (var reader = new StringReader(jsonData))
+            using (var jsonReader = new JsonTextReader(reader)
+            {
+                DateParseHandling = DateParseHandling.None
+            })
+            {
+                var jsonObject = JToken.ReadFrom(jsonReader);
+                return Validate(jsonObject, schema);
+            }
         }
 
         /// <summary>Validates the given JSON token.</summary>