diff --git a/source/ubl-settings-services.c b/source/ubl-settings-services.c
index b5778e0..c35b411 100644
--- a/source/ubl-settings-services.c
+++ b/source/ubl-settings-services.c
@@ -1044,14 +1044,14 @@ gboolean yon_interface_update(main_window *widgets){
             GtkTreeIter iter;
                 gtk_list_store_append(widgets->TimersList,&iter);
                 GDateTime *datetime=NULL;
-                if (atol(next)!=0){
+                if (!yon_char_is_empty(next)&&atol(next)!=0){
                     datetime = g_date_time_new_from_unix_local(atol(next)/1000000);
                     next = g_date_time_format(datetime,"%Y.%m.%d %H:%M:%S");
                     g_date_time_unref(datetime);
                 } else {
                     next="";
                 }
-                if (atol(left)!=0){
+                if (!yon_char_is_empty(left)&&atol(left)!=0){
                 datetime = g_date_time_new_from_unix_local(atol(left)/1000000);
                 GDateTime *now = g_date_time_new_now_local();
                 left = g_date_time_format(datetime,"%Y.%m.%d %H:%M:%S");
@@ -1067,14 +1067,14 @@ gboolean yon_interface_update(main_window *widgets){
                 } else {
                     left="";
                 }
-                if (atol(last)!=0){
+                if (!yon_char_is_empty(last)&&atol(last)!=0){
                     datetime = g_date_time_new_from_unix_local(atol(last)/1000000);
                     last = g_date_time_format(datetime,"%Y.%m.%d %H:%M:%S");
                     g_date_time_unref(datetime);
                 } else {
                     last="";
                 }
-                if (atol(passed)!=0){
+                if (!yon_char_is_empty(passed)&&atol(passed)!=0){
                     datetime = g_date_time_new_from_unix_local(atol(passed)/1000000);
                     passed = g_date_time_format(datetime,"%Y.%m.%d %H:%M:%S");
                     g_date_time_unref(datetime);