diff -up gnome-calendar-3.26.2/src/gcal-utils.c.libical-3.0 gnome-calendar-3.26.2/src/gcal-utils.c

--- gnome-calendar-3.26.2/src/gcal-utils.c.libical-3.0	2017-11-08 16:23:17.481220751 +0100

+++ gnome-calendar-3.26.2/src/gcal-utils.c	2017-11-08 16:25:06.896219238 +0100

@@ -204,14 +204,13 @@ gcal_dup_icaltime (const icaltimetype *d

   if (date == NULL)

     return NULL;

-  new_date= g_new (icaltimetype, 1);

+  new_date = g_new0 (icaltimetype, 1);

   new_date->year = date->year;

   new_date->month = date->month;

   new_date->day = date->day;

   new_date->hour = date->hour;

   new_date->minute = date->minute;

   new_date->second = date->second;

-  new_date->is_utc = date->is_utc;

   new_date->is_date = date->is_date;

   new_date->is_daylight = date->is_daylight;

   new_date->zone = date->zone;