Fixed MassTransit#5022 - assume UTC when no offset is present.

src/MassTransit/Initializers/TypeConverters/DateTimeTypeConverter.cs

@@ -1,6 +1,7 @@
 namespace MassTransit.Initializers.TypeConverters
 {
     using System;
+    using System.Globalization;
     using Internals;
 
 
@@ -55,7 +56,7 @@ public bool TryConvert(object input, out DateTime result)
 
         public bool TryConvert(string input, out DateTime result)
         {
-            if (DateTimeOffset.TryParse(input, out var value))
+            if (DateTimeOffset.TryParse(input, null, DateTimeStyles.AssumeUniversal, out var value))
             {
                 result = value.Offset == TimeSpan.Zero ? value.UtcDateTime : value.LocalDateTime;
                 return true;

tests/MassTransit.Tests/Serialization/DateTimeConverter_Specs.cs

@@ -0,0 +1,53 @@
+namespace MassTransit.Tests.Serialization;
+
+using System;
+using MassTransit.Initializers.TypeConverters;
+using NUnit.Framework;
+
+
+[TestFixture]
+public class DateTimeConverter_Specs
+{
+    [Test]
+    public void Should_convert_date_time_min_value()
+    {
+        var converter = new DateTimeTypeConverter();
+
+        var value = DateTime.MinValue;
+
+        Assert.That(converter.TryConvert(value, out string text));
+
+        Assert.That(converter.TryConvert(text, out var result));
+
+        Assert.That(result, Is.EqualTo(value));
+    }
+
+    [Test]
+    public void Should_convert_date_time_offset_min_value()
+    {
+        var converter = new DateTimeOffsetTypeConverter();
+
+        var value = DateTimeOffset.MinValue;
+
+        Assert.That(converter.TryConvert(value, out string text));
+
+        Assert.That(converter.TryConvert(text, out var result));
+
+        Assert.That(result, Is.EqualTo(value));
+    }
+
+    [Test]
+    public void Should_convert_date_time_min_value_to_offset()
+    {
+        var converter = new DateTimeTypeConverter();
+        var offsetConverter = new DateTimeOffsetTypeConverter();
+
+        var value = DateTime.MinValue.ToUniversalTime();
+
+        Assert.That(converter.TryConvert(value, out string text));
+
+        Assert.That(offsetConverter.TryConvert(text, out var result));
+
+        Assert.That(result.UtcDateTime, Is.EqualTo(value));
+    }
+}