diff --git a/fhem/CHANGED b/fhem/CHANGED
index ae7ffdee9..5ac9c05f4 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -1,5 +1,6 @@
 # Add changes at the top of the list. Keep it in ASCII, and 80-char wide.
 # Do not insert empty lines here, update check depends on it.
+  - change:  honor DURATION in 57_Calendar.pm
   - bugfix:  YAMAHA_AVR: don't let FHEM hang anymore, when the receiver
              is not reachable
   - change:  55_GDS.pm: use Blocking.pm for retrieval of large files
diff --git a/fhem/FHEM/57_Calendar.pm b/fhem/FHEM/57_Calendar.pm
index a4f8006c6..0ef6334b0 100644
--- a/fhem/FHEM/57_Calendar.pm
+++ b/fhem/FHEM/57_Calendar.pm
@@ -330,7 +330,11 @@ sub fromVEvent {
   $self->{uid}= $vevent->value("UID");
   $self->{uid}=~ s/\W//g; # remove all non-alphanumeric characters, this makes life easier for perl specials
   $self->{start}= tm($vevent->value("DTSTART"));
-  $self->{end}= tm($vevent->value("DTEND"));
+  if(defined($vevent->value("DTEND"))) {
+    $self->{end}= tm($vevent->value("DTEND"));
+  } elsif(defined($vevent->value("DURATION"))) {
+    $self->{end}= $self->{start} + d($vevent->value("DURATION"));
+  }
   $self->{lastModified}= tm($vevent->value("LAST-MODIFIED"));
   $self->{summary}= $vevent->value("SUMMARY");
   $self->{location}= $vevent->value("LOCATION");