diff --git a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.Designer.cs b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.Designer.cs
index ea558fa..ead5216 100644
--- a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.Designer.cs
+++ b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.Designer.cs
@@ -155,7 +155,8 @@
             resources.GetString("comboTimeFrame.Items4"),
             resources.GetString("comboTimeFrame.Items5"),
             resources.GetString("comboTimeFrame.Items6"),
-            resources.GetString("comboTimeFrame.Items7")});
+            resources.GetString("comboTimeFrame.Items7"),
+            resources.GetString("comboTimeFrame.Items101")});   // custom time frame value
             this.comboTimeFrame.Name = "comboTimeFrame";
             this.comboTimeFrame.SelectedIndexChanged += new System.EventHandler(this.comboTimeFrame_SelectedIndexChanged);
             // 
diff --git a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.cs b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.cs
index bccaa5e..a6bf911 100644
--- a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.cs
+++ b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.cs
@@ -36,6 +36,8 @@ namespace Acacia.Features.SyncState
 
         private readonly Button[] _syncButtons;
 
+        private readonly System.ComponentModel.ComponentResourceManager resources;
+
         private ZPushAccount SelectedAccount
         {
             get
@@ -48,6 +50,9 @@ namespace Acacia.Features.SyncState
         {
             InitializeComponent();
 
+            // Used for handling custom time frame values.
+            resources = new System.ComponentModel.ComponentResourceManager(typeof(SyncStateDialog));
+
             // Ensure these are in sync with ResyncOption
             _syncButtons = new Button[]
             {
@@ -81,6 +86,9 @@ namespace Acacia.Features.SyncState
 
             if (SelectedAccount == null)
                 comboTimeFrame.SelectedIndex = 0;
+            // Custom values handling. Custom values will be appended into comboTimeFrame after the last standard value (7)
+            else if (SelectedAccount.SyncTimeFrame == (SyncTimeFrame)(int)SyncTimeFrame.YEAR_1) // 1 year
+                comboTimeFrame.SelectedIndex = comboTimeFrame.Items.IndexOf(resources.GetString("comboTimeFrame.Items101"));
             else
                 comboTimeFrame.SelectedIndex = (int)SelectedAccount.SyncTimeFrame;
 
@@ -97,8 +105,17 @@ namespace Acacia.Features.SyncState
             if (SelectedAccount != null)
             {
                 SyncTimeFrame timeFrame = (SyncTimeFrame)comboTimeFrame.SelectedIndex;
-                bool isDirty = timeFrame != SelectedAccount.SyncTimeFrame;
-                buttonApplyTimeFrame.Enabled = buttonResetTimeFrame.Enabled = isDirty;
+                // Handle custom values
+                if ((int)timeFrame == comboTimeFrame.Items.IndexOf(resources.GetString("comboTimeFrame.Items101")))
+                {
+                    bool isDirty = SelectedAccount.SyncTimeFrame != (SyncTimeFrame)(int)SyncTimeFrame.YEAR_1;
+                    buttonApplyTimeFrame.Enabled = buttonResetTimeFrame.Enabled = isDirty;
+                }
+                else
+                {
+                    bool isDirty = timeFrame != SelectedAccount.SyncTimeFrame;
+                    buttonApplyTimeFrame.Enabled = buttonResetTimeFrame.Enabled = isDirty;
+                }
             }
             else
             {
@@ -118,8 +135,16 @@ namespace Acacia.Features.SyncState
             {
                 Busy = true;
 
-                // TODO: do this in the background
-                _feature.SetDeviceOptions(SelectedAccount, (SyncTimeFrame)comboTimeFrame.SelectedIndex);
+                // Custom values handling. Custom values will be appended into comboTimeFrame after the last standard value (7)
+                if (comboTimeFrame.SelectedItem.Equals(resources.GetString("comboTimeFrame.Items101")))
+                {
+                    _feature.SetDeviceOptions(SelectedAccount, (SyncTimeFrame)(int)SyncTimeFrame.YEAR_1);
+                }
+                else
+                {
+                    // TODO: do this in the background
+                    _feature.SetDeviceOptions(SelectedAccount, (SyncTimeFrame)comboTimeFrame.SelectedIndex);
+                }
                 CheckTimeFrameDirty();
             }
         }
diff --git a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.resx b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.resx
index d3b1824..c7427bd 100644
--- a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.resx
+++ b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.resx
@@ -444,6 +444,9 @@
   <data name="comboTimeFrame.Items7" xml:space="preserve">
     <value>6 months</value>
   </data>
+  <data name="comboTimeFrame.Items101" xml:space="preserve">
+    <value>1 year</value>
+  </data>
   <data name="comboTimeFrame.Location" type="System.Drawing.Point, System.Drawing">
     <value>4, 5</value>
   </data>
diff --git a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Properties/Resources.Designer.cs b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Properties/Resources.Designer.cs
index 6f2014a..a0200be 100644
--- a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Properties/Resources.Designer.cs
+++ b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Properties/Resources.Designer.cs
@@ -1438,7 +1438,18 @@ namespace Acacia.Properties {
                 return ResourceManager.GetString("SyncTimeFrame_WEEK_2", resourceCulture);
             }
         }
-        
+
+        /// <summary>
+        ///   Looks up a localized string similar to 1 year.
+        /// </summary>
+        internal static string SyncTimeFrame_YEAR_1
+        {
+            get
+            {
+                return ResourceManager.GetString("SyncTimeFrame_YEAR_1", resourceCulture);
+            }
+        }
+
         /// <summary>
         ///   Looks up a localized string similar to Kopano.
         /// </summary>
diff --git a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Properties/Resources.resx b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Properties/Resources.resx
index f026e3e..07f8f4e 100644
--- a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Properties/Resources.resx
+++ b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Properties/Resources.resx
@@ -578,6 +578,9 @@ New sync window: {1}</value>
   <data name="SyncTimeFrame_MONTH_6" xml:space="preserve">
     <value>6 months</value>
   </data>
+<data name="SyncTimeFrame_YEAR_1" xml:space="preserve">
+    <value>1 year</value>
+  </data>
   <data name="SyncTimeFrame_WEEK_1" xml:space="preserve">
     <value>1 week</value>
   </data>
diff --git a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/ZPush/ZPushTypes.cs b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/ZPush/ZPushTypes.cs
index 9e9de9e..8306e65 100644
--- a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/ZPush/ZPushTypes.cs
+++ b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/ZPush/ZPushTypes.cs
@@ -161,7 +161,8 @@ namespace Acacia.ZPush
         WEEK_2,
         MONTH_1,
         MONTH_3,
-        MONTH_6
+        MONTH_6,
+        YEAR_1 = 101    // Custom value
     }
 
     public static class SyncTimeFrameMethods