diff --git a/src/window/sun-page/sun-view.c b/src/window/sun-page/sun-view.c
index b551a14..d53a9f1 100644
--- a/src/window/sun-page/sun-view.c
+++ b/src/window/sun-page/sun-view.c
@@ -61,24 +61,24 @@ picplanner_sun_set_rise_upper_set (PicplannerSun *sun,
                                    double *coordinates_array,
                                    int *index_rise_upper_set_lower)
 {
-  char *char_morning_rise_time;
-  char *char_morning_rise_azimuth;
+  g_autofree char *char_morning_rise_time = NULL;
+  g_autofree char *char_morning_rise_azimuth = NULL;
 
-  char *char_upper_time;
-  char *char_upper_azimuth;
-  char *char_upper_elevation;
+  g_autofree char *char_upper_time = NULL;
+  g_autofree char *char_upper_azimuth = NULL;
+  g_autofree char *char_upper_elevation = NULL;
 
-  char *char_lower_time;
-  char *char_lower_azimuth;
-  char *char_lower_elevation;
+  g_autofree char *char_lower_time = NULL;
+  g_autofree char *char_lower_azimuth = NULL;
+  g_autofree char *char_lower_elevation = NULL;
 
-  char *char_evening_set_time;
-  char *char_evening_set_azimuth;
+  g_autofree char *char_evening_set_time = NULL;
+  g_autofree char *char_evening_set_azimuth = NULL;
 
-  GDateTime *date_time_rise;
-  GDateTime *date_time_upper;
-  GDateTime *date_time_set;
-  GDateTime *date_time_lower;
+  g_autoptr (GDateTime) date_time_rise = NULL;
+  g_autoptr (GDateTime) date_time_upper = NULL;
+  g_autoptr (GDateTime) date_time_set = NULL;
+  g_autoptr (GDateTime) date_time_lower = NULL;
 
 
   date_time_rise = g_date_time_add_minutes (date_time,
@@ -159,26 +159,6 @@ picplanner_sun_set_rise_upper_set (PicplannerSun *sun,
   gtk_label_set_text (GTK_LABEL (sun->label_lower_time), char_lower_time);
   gtk_label_set_text (GTK_LABEL (sun->label_lower_azimuth), char_lower_azimuth);
   gtk_label_set_text (GTK_LABEL (sun->label_lower_elevation), char_lower_elevation);
-
-
-  /*
-   * Free allocated memory.
-   */
-
-  g_date_time_unref (date_time_rise);
-  g_date_time_unref (date_time_upper);
-  g_date_time_unref (date_time_set);
-
-  g_free (char_morning_rise_time);
-  g_free (char_morning_rise_azimuth);
-  g_free (char_upper_time);
-  g_free (char_upper_azimuth);
-  g_free (char_upper_elevation);
-  g_free (char_lower_time);
-  g_free (char_lower_azimuth);
-  g_free (char_lower_elevation);
-  g_free (char_evening_set_time);
-  g_free (char_evening_set_azimuth);
 }
 
 
@@ -191,21 +171,21 @@ picplanner_sun_set_dark_blue_golden (PicplannerSun *sun,
                                      GDateTime *date_time,
                                      int *index_dark_blue_golden)
 {
-  char *char_dark_night_morning;
-  char *char_blue_hour_morning;
-  char *char_golden_hour_morning;
-  GDateTime *dark_night_morning_end;
-  GDateTime *blue_hour_morning_begin;
-  GDateTime *blue_hour_golden_hour_morning_switch;
-  GDateTime *golden_hour_morning_end;
+  g_autofree char *char_dark_night_morning = NULL;
+  g_autofree char *char_blue_hour_morning = NULL;
+  g_autofree char *char_golden_hour_morning = NULL;
+  g_autoptr (GDateTime) dark_night_morning_end = NULL;
+  g_autoptr (GDateTime) blue_hour_morning_begin = NULL;
+  g_autoptr (GDateTime) blue_hour_golden_hour_morning_switch = NULL;
+  g_autoptr (GDateTime) golden_hour_morning_end = NULL;
 
-  char *char_golden_hour_evening;
-  char *char_blue_hour_evening;
-  char *char_dark_night_evening;
-  GDateTime *golden_hour_evening_begin;
-  GDateTime *golden_hour_blue_hour_evening_switch;
-  GDateTime *blue_hour_evening_end;
-  GDateTime *dark_night_evening_begin;
+  g_autofree char *char_golden_hour_evening = NULL;
+  g_autofree char *char_blue_hour_evening = NULL;
+  g_autofree char *char_dark_night_evening = NULL;
+  g_autoptr (GDateTime) golden_hour_evening_begin = NULL;
+  g_autoptr (GDateTime) golden_hour_blue_hour_evening_switch = NULL;
+  g_autoptr (GDateTime) blue_hour_evening_end = NULL;
+  g_autoptr (GDateTime) dark_night_evening_begin = NULL;
 
   dark_night_morning_end = g_date_time_add_minutes (date_time,
                                                 index_dark_blue_golden[0]*24*60/NUM_DATA_POINTS-12*60);
@@ -354,26 +334,6 @@ picplanner_sun_set_dark_blue_golden (PicplannerSun *sun,
   gtk_label_set_text (GTK_LABEL (sun->label_evening_golden), char_golden_hour_evening);
   gtk_label_set_text (GTK_LABEL (sun->label_evening_blue), char_blue_hour_evening);
   gtk_label_set_text (GTK_LABEL (sun->label_evening_dark), char_dark_night_evening);
-
-
-  /*
-   * Free allocated memory.
-   */
-  g_date_time_unref (dark_night_morning_end);
-  g_date_time_unref (blue_hour_morning_begin);
-  g_date_time_unref (blue_hour_golden_hour_morning_switch);
-  g_date_time_unref (golden_hour_morning_end);
-  g_date_time_unref (golden_hour_evening_begin);
-  g_date_time_unref (golden_hour_blue_hour_evening_switch);
-  g_date_time_unref (blue_hour_evening_end);
-  g_date_time_unref (dark_night_evening_begin);
-
-  g_free (char_dark_night_morning);
-  g_free (char_blue_hour_morning);
-  g_free (char_golden_hour_morning);
-  g_free (char_golden_hour_evening);
-  g_free (char_blue_hour_evening);
-  g_free (char_dark_night_evening);
 }
 
 static void