diff -up evolution-3.12.11/calendar/gui/e-calendar-view.c.calendar-tooltip-date-format evolution-3.12.11/calendar/gui/e-calendar-view.c
--- evolution-3.12.11/calendar/gui/e-calendar-view.c.calendar-tooltip-date-format	2015-06-16 22:46:01.311668442 +0200
+++ evolution-3.12.11/calendar/gui/e-calendar-view.c	2015-06-16 22:46:01.329668304 +0200
@@ -1948,7 +1948,7 @@ get_label (struct icaltimetype *tt,
 
 	tmp_tm = icaltimetype_to_tm_with_zone (tt, f_zone, t_zone);
 
-	return e_datetime_format_format_tm ("calendar", "table", DTFormatKindDateTime, &tmp_tm);
+	return e_datetime_format_format_tm ("calendar", "table", tt->is_date ? DTFormatKindDate : DTFormatKindDateTime, &tmp_tm);
 }
 
 void
diff -up evolution-3.12.11/calendar/gui/e-memo-table.c.calendar-tooltip-date-format evolution-3.12.11/calendar/gui/e-memo-table.c
--- evolution-3.12.11/calendar/gui/e-memo-table.c.calendar-tooltip-date-format	2014-10-09 11:05:48.000000000 +0200
+++ evolution-3.12.11/calendar/gui/e-memo-table.c	2015-06-16 22:46:01.329668304 +0200
@@ -459,9 +459,7 @@ memo_table_query_tooltip (GtkWidget *wid
 	gchar *tmp;
 	const gchar *str;
 	GString *tmp2;
-	gchar buff[1001];
 	gboolean free_text = FALSE;
-	gboolean use_24_hour_format;
 	ECalComponent *new_comp;
 	ECalComponentOrganizer organizer;
 	ECalComponentDateTime dtstart, dtdue;
@@ -586,41 +584,42 @@ memo_table_query_tooltip (GtkWidget *wid
 	}
 
 	tmp2 = g_string_new ("");
-	use_24_hour_format = e_cal_model_get_use_24_hour_format (model);
 
 	if (dtstart.value) {
-		buff[0] = 0;
+		gchar *str;
 
-		tmp_tm = icaltimetype_to_tm_with_zone (
-			dtstart.value, zone, default_zone);
-		e_time_format_date_and_time (
-			&tmp_tm, use_24_hour_format,
-			FALSE, FALSE, buff, 1000);
+		tmp_tm = icaltimetype_to_tm_with_zone (dtstart.value, zone, default_zone);
+		str = e_datetime_format_format_tm ("calendar", "table",
+			dtstart.value->is_date ? DTFormatKindDate : DTFormatKindDateTime,
+			&tmp_tm);
 
-		if (buff[0]) {
+		if (str && *str) {
 			/* Translators: This is followed by an event's start date/time */
 			g_string_append (tmp2, _("Start: "));
-			g_string_append (tmp2, buff);
+			g_string_append (tmp2, str);
 		}
+
+		g_free (str);
 	}
 
 	if (dtdue.value) {
-		buff[0] = 0;
+		gchar *str;
 
-		tmp_tm = icaltimetype_to_tm_with_zone (
-			dtdue.value, zone, default_zone);
-		e_time_format_date_and_time (
-			&tmp_tm, use_24_hour_format,
-			FALSE, FALSE, buff, 1000);
+		tmp_tm = icaltimetype_to_tm_with_zone (dtdue.value, zone, default_zone);
+		str = e_datetime_format_format_tm ("calendar", "table",
+			dtdue.value->is_date ? DTFormatKindDate : DTFormatKindDateTime,
+			&tmp_tm);
 
-		if (buff[0]) {
+		if (str && *str) {
 			if (tmp2->len)
 				g_string_append (tmp2, "; ");
 
 			/* Translators: This is followed by an event's due date/time */
 			g_string_append (tmp2, _("Due: "));
-			g_string_append (tmp2, buff);
+			g_string_append (tmp2, str);
 		}
+
+		g_free (str);
 	}
 
 	if (tmp2->len) {
diff -up evolution-3.12.11/calendar/gui/e-task-table.c.calendar-tooltip-date-format evolution-3.12.11/calendar/gui/e-task-table.c
--- evolution-3.12.11/calendar/gui/e-task-table.c.calendar-tooltip-date-format	2014-10-09 11:05:52.000000000 +0200
+++ evolution-3.12.11/calendar/gui/e-task-table.c	2015-06-16 22:46:01.330668296 +0200
@@ -760,9 +760,7 @@ task_table_query_tooltip (GtkWidget *wid
 	gchar *tmp;
 	const gchar *str;
 	GString *tmp2;
-	gchar buff[1001];
 	gboolean free_text = FALSE;
-	gboolean use_24_hour_format;
 	ECalComponent *new_comp;
 	ECalComponentOrganizer organizer;
 	ECalComponentDateTime dtstart, dtdue;
@@ -871,7 +869,6 @@ task_table_query_tooltip (GtkWidget *wid
 	e_cal_component_get_due (new_comp, &dtdue);
 
 	default_zone = e_cal_model_get_timezone (model);
-	use_24_hour_format = e_cal_model_get_use_24_hour_format (model);
 
 	if (dtstart.tzid) {
 		zone = icalcomponent_get_timezone (
@@ -889,36 +886,38 @@ task_table_query_tooltip (GtkWidget *wid
 	tmp2 = g_string_new ("");
 
 	if (dtstart.value) {
-		buff[0] = 0;
+		gchar *str;
 
-		tmp_tm = icaltimetype_to_tm_with_zone (
-			dtstart.value, zone, default_zone);
-		e_time_format_date_and_time (
-			&tmp_tm, use_24_hour_format,
-			FALSE, FALSE, buff, 1000);
+		tmp_tm = icaltimetype_to_tm_with_zone (dtstart.value, zone, default_zone);
+		str = e_datetime_format_format_tm ("calendar", "table",
+			dtstart.value->is_date ? DTFormatKindDate : DTFormatKindDateTime,
+			&tmp_tm);
 
-		if (buff[0]) {
+		if (str && *str) {
 			g_string_append (tmp2, _("Start: "));
-			g_string_append (tmp2, buff);
+			g_string_append (tmp2, str);
 		}
+
+		g_free (str);
 	}
 
 	if (dtdue.value) {
-		buff[0] = 0;
+		gchar *str;
 
-		tmp_tm = icaltimetype_to_tm_with_zone (
-			dtdue.value, zone, default_zone);
-		e_time_format_date_and_time (
-			&tmp_tm, use_24_hour_format,
-			FALSE, FALSE, buff, 1000);
+		tmp_tm = icaltimetype_to_tm_with_zone (dtdue.value, zone, default_zone);
+		str = e_datetime_format_format_tm ("calendar", "table",
+			dtdue.value->is_date ? DTFormatKindDate : DTFormatKindDateTime,
+			&tmp_tm);
 
-		if (buff[0]) {
+		if (str && *str) {
 			if (tmp2->len)
 				g_string_append (tmp2, "; ");
 
 			g_string_append (tmp2, _("Due: "));
-			g_string_append (tmp2, buff);
+			g_string_append (tmp2, str);
 		}
+
+		g_free (str);
 	}
 
 	if (tmp2->len) {