diff --git a/src/Orchard/Localization/Services/IDateFormatter.cs b/src/Orchard/Localization/Services/IDateFormatter.cs
index cec67d09a..fad591801 100644
--- a/src/Orchard/Localization/Services/IDateFormatter.cs
+++ b/src/Orchard/Localization/Services/IDateFormatter.cs
@@ -6,17 +6,95 @@ using Orchard.Localization.Models;
 
 namespace Orchard.Localization.Services {
     public interface IDateFormatter : IDependency {
+
+        /// <summary>
+        /// Parses a date/time string into a <c>DateTimeParts</c> instance.
+        /// </summary>
+        /// <param name="dateTimeString">The date/time string to parse.</param>
+        /// <returns></returns>
         DateTimeParts ParseDateTime(string dateTimeString);
+
+        /// <summary>
+        /// Parses a date/time string into a <c>DateTimeParts</c> instance using the specified format.
+        /// </summary>
+        /// <param name="dateTimeString">The date/time string to parse.</param>
+        /// <param name="format">A standard or custom DateTime format string with which to parse the string.</param>
+        /// <returns></returns>
         DateTimeParts ParseDateTime(string dateTimeString, string format);
+
+        /// <summary>
+        /// Parses a date string into a <c>DateParts</c> instance.
+        /// </summary>
+        /// <param name="dateString">The date string to parse.</param>
+        /// <returns></returns>
         DateParts ParseDate(string dateString);
+
+        /// <summary>
+        /// Parses a date string into a <c>DateParts</c> instance using the specified format.
+        /// </summary>
+        /// <param name="dateString">The date string to parse.</param>
+        /// <param name="format">A standard or custom DateTime format string with which to parse the string.</param>
+        /// <returns></returns>
         DateParts ParseDate(string dateString, string format);
+
+        /// <summary>
+        /// Parses a time string into a <c>TimeParts</c> instance.
+        /// </summary>
+        /// <param name="timeString">The time string to parse.</param>
+        /// <returns></returns>
         TimeParts ParseTime(string timeString);
+
+        /// <summary>
+        /// Parses a time string into a <c>TimeParts</c> instance using the specified format.
+        /// </summary>
+        /// <param name="timeString">The date string to parse.</param>
+        /// <param name="format">A standard or custom DateTime format string with which to parse the string.</param>
+        /// <returns></returns>
         TimeParts ParseTime(string timeString, string format);
+
+        /// <summary>
+        /// Formats a <c>DateTimeParts</c> instance into a short date/time string.
+        /// </summary>
+        /// <param name="parts">The <c>DateTimeParts</c> instance to format.</param>
+        /// <returns></returns>
         string FormatDateTime(DateTimeParts parts);
+
+        /// <summary>
+        /// Formats a <c>DateTimeParts</c> instance into a string.
+        /// </summary>
+        /// <param name="parts">The <c>DateTimeParts</c> instance to format.</param>
+        /// <param name="format">A standard or custom DateTime format string with which to format the string.</param>
+        /// <returns></returns>
         string FormatDateTime(DateTimeParts parts, string format);
+
+        /// <summary>
+        /// Formats a <c>DateParts</c> instance into a short date string.
+        /// </summary>
+        /// <param name="parts">The <c>DateParts</c> instance to format.</param>
+        /// <returns></returns>
         string FormatDate(DateParts parts);
+
+        /// <summary>
+        /// Formats a <c>DateParts</c> instance into a string.
+        /// </summary>
+        /// <param name="parts">The <c>DateParts</c> instance to format.</param>
+        /// <param name="format">A standard or custom DateTime format string with which to format the string.</param>
+        /// <returns></returns>
         string FormatDate(DateParts parts, string format);
+
+        /// <summary>
+        /// Formats a <c>TimeParts</c> instance into a long time string.
+        /// </summary>
+        /// <param name="parts">The <c>DateParts</c> instance to format.</param>
+        /// <returns></returns>
         string FormatTime(TimeParts parts);
+
+        /// <summary>
+        /// Formats a <c>TimeParts</c> instance into a string.
+        /// </summary>
+        /// <param name="parts">The <c>TimeParts</c> instance to format.</param>
+        /// <param name="format">A standard or custom DateTime format string with which to format the string.</param>
+        /// <returns></returns>
         string FormatTime(TimeParts parts, string format);
     }
 }