diff --git a/tests/meson.build b/tests/meson.build
index 334b9b96..29aff0a2 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -38,6 +38,7 @@ tests = [
   'range',
   'range-tree',
   #'server', # https://gitlab.gnome.org/GNOME/gnome-calendar/-/issues/1251
+  'utils',
 ]
 
 foreach test : tests
diff --git a/tests/test-utils.c b/tests/test-utils.c
new file mode 100644
index 00000000..e2e382e9
--- /dev/null
+++ b/tests/test-utils.c
@@ -0,0 +1,136 @@
+/* test-utils.c
+ *
+ * Copyright © 2018 Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <glib.h>
+
+#include "gcal-utils.h"
+
+#define EVENT_STRING_FOR_DATE(dtstart,dtend)    \
+                   "BEGIN:VEVENT\n"             \
+                   "SUMMARY:Stub event\n"       \
+                   "UID:example@uid\n"          \
+                   "DTSTAMP:19970114T170000Z\n" \
+                   "DTSTART"dtstart"\n"        \
+                   "DTEND"dtend"\n"            \
+                   "END:VEVENT\n"
+
+#define STUB_CALENDAR_VTZ(dtstart,dtend)                                 \
+                    "BEGIN:VCALENDAR\n"                                  \
+                    "VERSION:2.0\n"                                      \
+                    "METHOD:PUBLISH\n"                                   \
+                    "BEGIN:VTIMEZONE\n"                                  \
+                    "TZID:StubTz\n"                                      \
+                    "BEGIN:STANDARD\n"                                   \
+                    "DTSTART:16011028T030000\n"                          \
+                    "RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10\n"          \
+                    "TZOFFSETFROM:+0200\n"                               \
+                    "TZOFFSETTO:+0100\n"                                 \
+                    "END:STANDARD\n"                                     \
+                    "BEGIN:DAYLIGHT\n"                                   \
+                    "DTSTART:16010325T020000\n"                          \
+                    "RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3\n"           \
+                    "TZOFFSETFROM:+0100\n"                               \
+                    "TZOFFSETTO:+0200\n"                                 \
+                    "END:DAYLIGHT\n"                                     \
+                    "END:VTIMEZONE\n"                                    \
+                    "BEGIN:VEVENT\n"                                     \
+                    "DTSTART;TZID=StubTz"dtstart"\n"                     \
+                    "DTEND;TZID=StubTz"dtend"\n"                         \
+                    "LOCATION:somewhere\n"                               \
+                    "SEQUENCE:0\n"                                       \
+                    "UID:389584207457478\n"                              \
+                    "DTSTAMP:20240608T184316Z\n"                         \
+                    "SUMMARY:Test time zone\n"                           \
+                    "CATEGORIES:\n"                                      \
+                    "END:VEVENT\n"                                       \
+                    "END:VCALENDAR\n"
+
+/*********************************************************************************************************************/
+
+static void
+date_time_from_icaltime (void)
+{
+  struct
+    {
+      const gchar *string;
+      const gchar *dt_start;
+      const gchar *dt_end;
+    }
+  events[] = {
+    {
+      EVENT_STRING_FOR_DATE (";TZID=America/New_York:20241209T170000",
+      ";TZID=America/New_York:20241209T180000"), "2024-12-09T17:00:00-05", "2024-12-09T18:00:00-05"
+    },
+    {
+      EVENT_STRING_FOR_DATE(":20240709T170000Z", ":20240709T180000Z"), "2024-07-09T17:00:00Z",
+      "2024-07-09T18:00:00Z"
+    },
+    {
+      // Virtual time zone in standard time
+      STUB_CALENDAR_VTZ(":20241103T103000", ":20241103T114500"), "2024-11-03T10:30:00+01",
+      "2024-11-03T11:45:00+01"
+    },
+    {
+      // Virtual time zone with Daylight Saving Time
+      STUB_CALENDAR_VTZ(":20240603T103000", ":20240603T114500"), "2024-06-03T10:30:00+02",
+      "2024-06-03T11:45:00+02"
+    },
+  };
+
+  for (gsize i = 0; i < G_N_ELEMENTS (events); i++)
+    {
+
+      g_autoptr (GDateTime) gdt_start = NULL;
+      g_autoptr (GDateTime) gdt_end = NULL;
+      ICalTime *dt_start = NULL;
+      ICalTime *dt_end = NULL;
+      ICalComponent *comp = NULL;
+
+      comp = i_cal_component_new_from_string (events[i].string);
+      g_assert_nonnull (comp);
+
+      dt_start = i_cal_component_get_dtstart (comp);
+      g_assert_nonnull (dt_start);
+      gdt_start = gcal_date_time_from_icaltime (dt_start);
+      g_assert_nonnull (gdt_start);
+
+      dt_end = i_cal_component_get_dtend (comp);
+      g_assert_nonnull (dt_end);
+      gdt_end = gcal_date_time_from_icaltime (dt_end);
+      g_assert_nonnull (gdt_end);
+
+      g_assert_cmpstr (g_date_time_format_iso8601 (gdt_start), ==, events[i].dt_start);
+      g_assert_cmpstr (g_date_time_format_iso8601 (gdt_end), ==, events[i].dt_end);
+    }
+}
+
+/*********************************************************************************************************************/
+
+gint
+main (gint   argc,
+      gchar *argv[])
+{
+  g_setenv ("TZ", "UTC", TRUE);
+
+  g_test_init (&argc, &argv, NULL);
+  g_test_bug_base ("https://gitlab.gnome.org/GNOME/gnome-calendar/-/issues/");
+
+  g_test_add_func ("/utils/date-time/date_time_from_icaltime", date_time_from_icaltime);
+
+  return g_test_run ();
+}