diff --git a/net-core/Ical.Net/Ical.Net/DataTypes/Period.cs b/net-core/Ical.Net/Ical.Net/DataTypes/Period.cs
index 3d1e18ef7..6676c8288 100644
--- a/net-core/Ical.Net/Ical.Net/DataTypes/Period.cs
+++ b/net-core/Ical.Net/Ical.Net/DataTypes/Period.cs
@@ -1,7 +1,7 @@
-using System;
 using Ical.Net.Interfaces.DataTypes;
 using Ical.Net.Interfaces.General;
 using Ical.Net.Serialization.iCalendar.Serializers.DataTypes;
+using System;
 
 namespace Ical.Net.DataTypes
 {
@@ -11,7 +11,7 @@ public class Period : EncodableDataType, IComparable<Period>
         public Period() { }
 
         public Period(IDateTime occurs)
-            : this(occurs, default(TimeSpan)) {}
+            : this(occurs, default(TimeSpan)) { }
 
         public Period(IDateTime start, IDateTime end)
         {
@@ -60,21 +60,30 @@ public override void CopyFrom(ICopyable obj)
             Duration = p.Duration;
         }
 
-        protected bool Equals(Period other) => Equals(StartTime, other.StartTime) && Equals(EndTime, other.EndTime) && Duration.Equals(other.Duration);
+        protected bool Equals(Period other) => IsSameInstant(StartTime, other.StartTime) && IsSameInstant(EndTime, other.EndTime) && Duration.Equals(other.Duration);
 
         public override bool Equals(object obj)
         {
             if (ReferenceEquals(null, obj)) return false;
             if (ReferenceEquals(this, obj)) return true;
-            return obj.GetType() == GetType() && Equals((Period) obj);
+            return obj.GetType() == GetType() && Equals((Period)obj);
+        }
+
+        public static bool IsSameInstant(IDateTime a, IDateTime b)
+        {
+            if (a == null || b == null)
+            {
+                return a == b;
+            }
+            return Equals(a.AsUtc, b.AsUtc);
         }
 
         public override int GetHashCode()
         {
             unchecked
             {
-                var hashCode = StartTime?.GetHashCode() ?? 0;
-                hashCode = (hashCode * 397) ^ (EndTime?.GetHashCode() ?? 0);
+                var hashCode = StartTime?.AsUtc.GetHashCode() ?? 0;
+                hashCode = (hashCode * 397) ^ (EndTime?.AsUtc.GetHashCode() ?? 0);
                 hashCode = (hashCode * 397) ^ Duration.GetHashCode();
                 return hashCode;
             }