[gnome-calendar] window: mark date format string for new event popover for translation

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

commit adfffad88d1ca2f9c620e02b3754dfe08a194d26
Author: Marcus Lundblad <ml update uu se>
Date:   Fri Apr 3 12:31:07 2015 +0200

    window: mark date format string for new event popover for translation
    
    https://bugzilla.gnome.org/show_bug.cgi?id=746928

 src/gcal-window.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/gcal-window.c b/src/gcal-window.c
index 0b0d9ed..5ce4967 100644
--- a/src/gcal-window.c
+++ b/src/gcal-window.c
@@ -636,7 +636,10 @@ prepare_new_event_widget (GcalWindow *window)
 
   /* setting title */
   tm_date = icaltimetype_to_tm (priv->event_creation_data->start_date);
-  e_utf8_strftime_fix_am_pm (start, 64, "%B %d", &tm_date);
+  /* Translators:
+   * this is the format string for representing a date consisting of a month name
+   * and a date of month. */
+  e_utf8_strftime_fix_am_pm (start, 64, C_("event date format", "%B %d"), &tm_date);
   title_date = g_strdup_printf (_("New Event on %s"), start);
 
   gtk_label_set_text (GTK_LABEL (priv->new_event_title_label),