diff --git a/ChangeLog b/ChangeLog
index b4eefb8ae..acdadb9a3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2011-03-20  Wolfgang Sourdeau  <wsourdeau@inverse.ca>
 
+	* OpenChange/NSCalendarDate+MAPIStore.m
+	(+dateFromMinutesSince1601): new constructor, helpful for MAPI
+	recurrence structures.
+
 	* OpenChange/MAPIStoreCalendarMessageTable.m,
 	OpenChange/MAPIStoreTasksMessageTable.m,
 	OpenChange/MAPIStoreContactsMessageTable.m,
diff --git a/OpenChange/NSCalendarDate+MAPIStore.h b/OpenChange/NSCalendarDate+MAPIStore.h
index 40ee52335..ac9ad263f 100644
--- a/OpenChange/NSCalendarDate+MAPIStore.h
+++ b/OpenChange/NSCalendarDate+MAPIStore.h
@@ -28,6 +28,7 @@
 @interface NSCalendarDate (MAPIStoreDataTypes)
 
 + (id) dateFromFileTime: (const struct FILETIME *) timeValue;
++ (id) dateFromMinutesSince1601: (uint32_t) minutes;
 
 - (struct FILETIME *) asFileTimeInMemCtx: (void *) memCtx;
 
diff --git a/OpenChange/NSCalendarDate+MAPIStore.m b/OpenChange/NSCalendarDate+MAPIStore.m
index 1b83ef314..c9b847fdb 100644
--- a/OpenChange/NSCalendarDate+MAPIStore.m
+++ b/OpenChange/NSCalendarDate+MAPIStore.m
@@ -46,6 +46,19 @@ _setupRefDate()
   [refDate retain];
 }
 
++ (id) dateFromMinutesSince1601: (uint32_t) minutes
+{
+  NSCalendarDate *result;
+
+  if (!refDate)
+    _setupRefDate ();
+
+  result = [refDate dateByAddingYears: 0 months: 0 days: 0 hours: 0
+			      minutes: minutes seconds: 0];
+
+  return result;
+}
+
 + (id) dateFromFileTime: (const struct FILETIME *) timeValue
 {
   NSCalendarDate *result;