diff --git a/SOPE/NGCards/ChangeLog b/SOPE/NGCards/ChangeLog
index 30f76ebbe..db2b2b1b0 100644
--- a/SOPE/NGCards/ChangeLog
+++ b/SOPE/NGCards/ChangeLog
@@ -1,3 +1,9 @@
+2012-03-26  Wolfgang Sourdeau  <wsourdeau@inverse.ca>
+
+	* iCalDateTime.m (_setDateTime:forAllDayEntity:): set or unset the
+	"VALUE" parameter to the date instance, depending on its the
+	all-dayness.
+
 2012-03-11  Wolfgang Sourdeau  <wsourdeau@inverse.ca>
 
 	* iCalEvent.m (-hasDuration): returns NO when the value is present
diff --git a/SOPE/NGCards/iCalDateTime.m b/SOPE/NGCards/iCalDateTime.m
index 251c46d0a..81d0a88aa 100644
--- a/SOPE/NGCards/iCalDateTime.m
+++ b/SOPE/NGCards/iCalDateTime.m
@@ -137,6 +137,11 @@
   else
     timeString = @"";
 
+  if (forAllDayEntity)
+    [self setValue: 0 ofAttribute: @"VALUE" to: @"DATE"];
+  else
+    [self removeValue: @"DATE" fromAttribute: @"VALUE"];
+
   [self setSingleValue: timeString forKey: @""];
 }