diff --git a/Samples/Samples/ViewModel/CalendarEventAddViewModel.cs b/Samples/Samples/ViewModel/CalendarEventAddViewModel.cs
index dd69ccfe5..16e734008 100644
--- a/Samples/Samples/ViewModel/CalendarEventAddViewModel.cs
+++ b/Samples/Samples/ViewModel/CalendarEventAddViewModel.cs
@@ -278,7 +278,7 @@ public TimeSpan EndTime
         public bool DisplayTimeInformation => !AllDay && !CanAlterRecurrence;
 
         // Recurrence Setup
-        public bool CanAlterRecurrence => SelectedRecurrenceType != null;
+        public bool CanAlterRecurrence => SelectedRecurrenceType != null && SelectedRecurrenceType != RecurrenceFrequency.None;
 
         public bool IsDaily => SelectedRecurrenceType == RecurrenceFrequency.Daily;
 
@@ -348,6 +348,7 @@ public bool IsMonthDaySpecific
 
         public List<RecurrenceFrequency> RecurrenceTypes { get; } = new List<RecurrenceFrequency>()
         {
+            RecurrenceFrequency.None,
             RecurrenceFrequency.Daily,
             RecurrenceFrequency.Weekly,
             RecurrenceFrequency.Monthly,
diff --git a/Xamarin.Essentials/Calendars/Calendars.android.cs b/Xamarin.Essentials/Calendars/Calendars.android.cs
index 856f74ed7..7dff83827 100644
--- a/Xamarin.Essentials/Calendars/Calendars.android.cs
+++ b/Xamarin.Essentials/Calendars/Calendars.android.cs
@@ -60,7 +60,7 @@ static bool IsCalendarReadOnly(CalendarAccess accessLevel)
                     return false;
             }
         }
-      
+
         static async Task<IEnumerable<CalendarEvent>> PlatformGetEventsAsync(string calendarId = null, DateTimeOffset? startDate = null, DateTimeOffset? endDate = null)
         {
             await Permissions.RequestAsync<Permissions.CalendarRead>();
@@ -84,7 +84,7 @@ static async Task<IEnumerable<CalendarEvent>> PlatformGetEventsAsync(string cale
 
             var instancesUri = instanceUriBuilder.Build();
             var calendarSpecificEvent = string.Empty;
-          
+
             if (!string.IsNullOrEmpty(calendarId))
             {
                 // Android event ids are always integers
@@ -383,7 +383,7 @@ static async Task<bool> PlatformUpdateCalendarEvent(CalendarEvent eventToUpdate)
             var thisEvent = await GetEventByIdAsync(eventToUpdate.Id);
 
             var eventUri = CalendarContract.Events.ContentUri;
-            var eventValues = SetupContentValues(eventToUpdate);
+            var eventValues = SetupContentValues(eventToUpdate, true);
 
             if (string.IsNullOrEmpty(eventToUpdate.CalendarId) || thisEvent == null)
             {
@@ -405,7 +405,7 @@ static async Task<bool> PlatformUpdateCalendarEvent(CalendarEvent eventToUpdate)
             throw new ArgumentException("[Android]: Could not update appointment with supplied parameters");
         }
 
-        static ContentValues SetupContentValues(CalendarEvent newEvent)
+        static ContentValues SetupContentValues(CalendarEvent newEvent, bool existingEvent = false)
         {
             var eventValues = new ContentValues();
             eventValues.Put(CalendarContract.Events.InterfaceConsts.CalendarId, newEvent.CalendarId);
@@ -418,8 +418,17 @@ static ContentValues SetupContentValues(CalendarEvent newEvent)
             eventValues.Put(CalendarContract.Events.InterfaceConsts.Dtend, newEvent.EndDate.HasValue ? newEvent.EndDate.Value.ToUnixTimeMilliseconds().ToString() : newEvent.StartDate.AddDays(1).ToUnixTimeMilliseconds().ToString());
             eventValues.Put(CalendarContract.Events.InterfaceConsts.EventTimezone, TimeZoneInfo.Local.Id);
             eventValues.Put(CalendarContract.Events.InterfaceConsts.EventEndTimezone, TimeZoneInfo.Local.Id);
-            eventValues.Put(CalendarContract.Events.InterfaceConsts.Deleted, 0);
-            eventValues.Put(CalendarContract.Events.InterfaceConsts.Rrule, newEvent.RecurrancePattern.ConvertRule());
+            if (newEvent.RecurrancePattern != null)
+            {
+                eventValues.Put(CalendarContract.Events.InterfaceConsts.Rrule, newEvent.RecurrancePattern.ConvertRule());
+            }
+            else if (existingEvent)
+            {
+                eventValues.PutNull(CalendarContract.Events.InterfaceConsts.Rrule);
+                eventValues.PutNull(CalendarContract.Events.InterfaceConsts.Duration);
+                eventValues.Put(CalendarContract.Events.InterfaceConsts.Deleted, 0);
+            }
+
             return eventValues;
         }
 
diff --git a/Xamarin.Essentials/Types/Calendar.shared.cs b/Xamarin.Essentials/Types/Calendar.shared.cs
index 471074740..5f2e8ad30 100644
--- a/Xamarin.Essentials/Types/Calendar.shared.cs
+++ b/Xamarin.Essentials/Types/Calendar.shared.cs
@@ -92,6 +92,7 @@ public class RecurrenceRule
 
     public enum RecurrenceFrequency
     {
+        None = -1,
         Daily = 0,
         Weekly = 1,
         Monthly = 2,