diff --git a/calendar/inc/class.calendar_ical.inc.php b/calendar/inc/class.calendar_ical.inc.php
index 49a113a7b8..f2c811bd39 100644
--- a/calendar/inc/class.calendar_ical.inc.php
+++ b/calendar/inc/class.calendar_ical.inc.php
@@ -2506,7 +2506,7 @@ class calendar_ical extends calendar_boupdate
 									);
 								}
 							}
-							elseif (preg_match('/MD(\d+)(?: [^ ]+)? ([0-9T]+)/',$recurence, $recurenceMatches))
+							elseif (preg_match('/MD(\d+)(?: [^ ]+)? ([0-9TZ]+)/',$recurence, $recurenceMatches))
 							{
 								$vcardData['recur_type'] = MCAL_RECUR_MONTHLY_MDAY;
 								$vcardData['recur_interval'] = $recurenceMatches[1];
@@ -2567,7 +2567,7 @@ class calendar_ical extends calendar_boupdate
 									);
 								}
 							}
-							elseif (preg_match('/YM(\d+)(?: [^ ]+)? ([0-9T]+)/',$recurence, $recurenceMatches))
+							elseif (preg_match('/YM(\d+)(?: [^ ]+)? ([0-9TZ]+)/',$recurence, $recurenceMatches))
 							{
 								$vcardData['recur_interval'] = $recurenceMatches[1];
 								$vcardData['recur_enddate'] = $this->vCalendar->_parseDateTime($recurenceMatches[2]);