[gnome-calendar] event: format tzid with builtin GDateTime facilities

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 1cdd73a69ac0fdf9404b3b5229467a7f77cf741a
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sun Feb 28 14:11:43 2016 -0300

    event: format tzid with builtin GDateTime facilities

 src/gcal-event.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gcal-event.c b/src/gcal-event.c
index d8b36ac..64d821c 100644
--- a/src/gcal-event.c
+++ b/src/gcal-event.c
@@ -125,7 +125,7 @@ build_component_from_datetime (GcalEvent *self,
   comp_dt->value = NULL;
   comp_dt->tzid = NULL;
 
-  tzid = format_utc_offset (g_date_time_get_utc_offset (dt));
+  tzid = g_date_time_format (dt, "%Z");
 
   comp_dt->value = datetime_to_icaltime (dt);
   comp_dt->value->zone = icaltimezone_get_builtin_timezone_from_tzid (tzid);