--- openchange-openchange-2.3-VULCAN/libexchange2ical/exchange2ical_property.c.orig	2019-07-03 05:47:28.580770627 +0200
+++ openchange-openchange-2.3-VULCAN/libexchange2ical/exchange2ical_property.c	2019-07-03 17:20:38.425459111 +0200
@@ -517,7 +517,7 @@
 				icalproperty_add_parameter(prop, tzid);
 			} else {
 				/*Get time from dtstart*/
-				icaltime.is_utc = 1;
+				icaltime_set_timezone(&icaltime, icaltimezone_get_utc_timezone());
 				if (exchange2ical->apptEndWhole){
 					dttime = get_icaltime_from_FILETIME_UTC(exchange2ical->apptStartWhole);
 					icaltime.hour   = dttime.hour;
--- openchange-openchange-2.3-VULCAN/libexchange2ical/exchange2ical_utils.c.orig	2019-07-03 05:47:28.580770627 +0200
+++ openchange-openchange-2.3-VULCAN/libexchange2ical/exchange2ical_utils.c	2019-07-03 17:25:46.117125535 +0200
@@ -241,10 +241,9 @@
 	tt.minute = tm->tm_min;
 	tt.second = tm->tm_sec;
 
-	tt.is_utc      = 0;
 	tt.is_date     = 0;
 	tt.is_daylight = 0;
-	tt.zone        = 0;
+	tt.zone        = NULL;
 
 	return tt;
 }
@@ -254,7 +253,7 @@
 	struct icaltimetype tt;
 	
 	tt = get_icaltimetype_from_tm(tm);
-	tt.is_utc      = 1;
+	icaltime_set_timezone(&tt, icaltimezone_get_utc_timezone());
 	
 	return tt;
 }
@@ -269,12 +268,10 @@
 	tt.hour   = 0;
 	tt.minute = 0;
 	tt.second = 0;
-	tt.zone   = NULL;
 
-	tt.is_utc      = 1;
 	tt.is_date     = 1;
 	tt.is_daylight = 0;
-	tt.zone        = NULL;
+	icaltime_set_timezone(&tt, icaltimezone_get_utc_timezone());
 
 	return tt;
 }
@@ -314,7 +311,6 @@
 	tt.minute = tm->tm_min;                                                
 	tt.second = tm->tm_sec;
 	tt.is_date = 0;
-	tt.is_utc = 0;
 	tt.is_daylight = 0;
 	tt.zone = NULL;
 
@@ -340,9 +336,8 @@
 	tt.minute = tm->tm_min;                                                
 	tt.second = tm->tm_sec;
 	tt.is_date = 0;
-	tt.is_utc = 1;
 	tt.is_daylight = 0;
-	tt.zone = NULL;
+	icaltime_set_timezone(&tt, icaltimezone_get_utc_timezone());
 
 	return tt;
 }
@@ -372,9 +367,8 @@
 	tt.minute = 0;                                                
 	tt.second = 0;
 	tt.is_date = 1;
-	tt.is_utc = 1;
 	tt.is_daylight = 0;
-	tt.zone = NULL;
+	icaltime_set_timezone(&tt, icaltimezone_get_utc_timezone());
 
 	return tt;
 }
@@ -391,10 +385,9 @@
 	tt.minute = 0;
 	tt.second = 0;
 
-	tt.is_utc      = 1;
 	tt.is_date     = 1;
 	tt.is_daylight = 0;
-	tt.zone        = NULL;
+	icaltime_set_timezone(&tt, icaltimezone_get_utc_timezone());
 
 	return tt;
 }