diff --git a/FortnoxAPILibrary.Tests/ConnectorTests/InvoiceTests.cs b/FortnoxAPILibrary.Tests/ConnectorTests/InvoiceTests.cs
index 2ce52554..c0ad8510 100644
--- a/FortnoxAPILibrary.Tests/ConnectorTests/InvoiceTests.cs
+++ b/FortnoxAPILibrary.Tests/ConnectorTests/InvoiceTests.cs
@@ -272,5 +272,22 @@ public void Test_Email()
             new ArticleConnector().Delete(tmpArticle.ArticleNumber);
             #endregion Delete arranged resources
         }
+
+        [TestMethod]
+        public void Test_Search()
+        {
+            var connector = new InvoiceConnector();
+            connector.FromDate = new DateTime(2020,10, 10);
+            connector.ToDate = new DateTime(2020, 10, 15);
+
+            var result = connector.Find();
+
+            Assert.IsTrue(result.Entities.Count > 0);
+            foreach (var invoice in result.Entities)
+            {
+                Assert.IsTrue(invoice.InvoiceDate >= connector.FromDate);
+                Assert.IsTrue(invoice.InvoiceDate <= connector.ToDate);
+            }
+        }
     }
 }
diff --git a/FortnoxAPILibrary.Tests/ReportedIssuesTests.cs b/FortnoxAPILibrary.Tests/ReportedIssuesTests.cs
index 387b8462..af406043 100644
--- a/FortnoxAPILibrary.Tests/ReportedIssuesTests.cs
+++ b/FortnoxAPILibrary.Tests/ReportedIssuesTests.cs
@@ -56,7 +56,7 @@ public void Test_issue51_fixed() //Origins from https://github.com/FortnoxAB/csh
 
             //Act & Assert
             var connector = new VoucherConnector();
-            connector.FinancialYearID = "1";
+            connector.FinancialYearID = 1;
 
             connector.Limit = 2;
             var voucherResult = connector.Find();
diff --git a/FortnoxAPILibrary/Connectors/VoucherConnector.cs b/FortnoxAPILibrary/Connectors/VoucherConnector.cs
index e74ffb6b..a859394d 100644
--- a/FortnoxAPILibrary/Connectors/VoucherConnector.cs
+++ b/FortnoxAPILibrary/Connectors/VoucherConnector.cs
@@ -16,20 +16,6 @@ public class VoucherConnector : EntityConnector<Voucher, EntityCollection<Vouche
         [SearchParameter("filter")]
 		public Filter.Voucher? FilterBy { get; set; }
 
-        /// <summary>
-        /// <para>Use FinancialYearDate to select the financial year to use.</para>
-        /// <para>If omitted the default financial year will be selected</para>
-        /// </summary>
-        [SearchParameter("financialyeardate")]
-        public string FinancialYearDate { get; set; }
-
-        /// <summary>
-        /// <para>Use FinancialYearID to select the financial year to use.</para>
-        /// <para>If omitted the default financial year will be selected</para>
-        /// </summary>
-        [SearchParameter("financialyear")]
-        public string FinancialYearID { get; set; }
-
 		/// <summary>
 		/// Use with Find() to limit the search result
 		/// </summary>
diff --git a/FortnoxAPILibrary/EntityConnector.cs b/FortnoxAPILibrary/EntityConnector.cs
index a00d3fa6..27612e8b 100644
--- a/FortnoxAPILibrary/EntityConnector.cs
+++ b/FortnoxAPILibrary/EntityConnector.cs
@@ -35,6 +35,32 @@ public abstract class EntityConnector<TEntity, TEntityCollection, TSort> : BaseC
         /// </summary>
         [SearchParameter]
         public DateTime? LastModified { get; set; }
+        /// <summary>
+        /// Use with Find() to limit the search result.
+        /// Selects which financial year should be used.
+        /// </summary>
+        [SearchParameter("financialyear")]
+        public long? FinancialYearID { get; set; }
+        /// <summary>
+        /// Use with Find() to limit the search result.
+        /// Selects which financial year should be used by date
+        /// </summary>
+        [SearchParameter]
+        public DateTime? FinancialYearDate { get; set; }
+        /// <summary>
+        /// Use with Find() to limit the search result.
+        /// Defines a selection based on a start date.
+        /// Only available for invoices, orders, offers and vouchers
+        /// </summary>
+        [SearchParameter]
+        public DateTime? FromDate { get; set; }
+        /// <summary>
+        /// Use with Find() to limit the search result.
+        /// Defines a selection based on an end date.
+        /// Only available for invoices, orders, offers and vouchers
+        /// </summary>
+        [SearchParameter]
+        public DateTime? ToDate { get; set; }
 
         /// <summary>
         /// Use with Find() to limit the search result
@@ -166,7 +192,12 @@ private static string GetStringValue(object value, Type type)
             if (type.IsEnum)
                return ((Enum)value).GetStringValue();
             if (type == typeof(DateTime))
-                return ((DateTime)value).ToString(APIConstants.DateAndTimeFormat);
+            {
+                if (((DateTime)value).Date == (DateTime)value) //Date without hours/minutes/seconds..
+                    return ((DateTime)value).ToString(APIConstants.DateFormat);
+
+                return ((DateTime) value).ToString(APIConstants.DateAndTimeFormat);
+            }
 
             return value.ToString().ToLower();
         }
diff --git a/FortnoxAPILibrary/Interfaces/IConnector.cs b/FortnoxAPILibrary/Interfaces/IConnector.cs
index 794d495d..efc6832e 100644
--- a/FortnoxAPILibrary/Interfaces/IConnector.cs
+++ b/FortnoxAPILibrary/Interfaces/IConnector.cs
@@ -20,9 +20,14 @@ public interface IConnector : IBaseConnector //TODO: Rename to IResourceConnecto
     public interface IEntityConnector : IConnector
     {
         //Base search params
-        int? Limit { get; set; }
         DateTime? LastModified { get; set; }
+        public long? FinancialYearID { get; set; }
+        public DateTime? FinancialYearDate { get; set; }
+        public DateTime? FromDate { get; set; }
+        public DateTime? ToDate { get; set; }
+
         int? Page { get; set; }
         int? Offset { get; set; }
+        int? Limit { get; set; }
     }
 }