diff --git a/includes/functions_display.php b/includes/functions_display.php
index 44478db..c9a921f 100644
--- a/includes/functions_display.php
+++ b/includes/functions_display.php
@@ -421,6 +421,10 @@ function display_forums($root_data = '', $display_moderators = true, $return_mod
 				continue;
 			}
 
+			$current_hour = date('H');
+			$day_state = $current_hour >= 6 && $current_hour <= 18 ? 'jour' : 'nuit';
+			$forum_image = str_replace(".", "_$day_state.", $row['forum_image']);
+
 			$cat_row = array(
 				'S_IS_CAT'				=> true,
 				'FORUM_ID'				=> $row['forum_id'],
@@ -428,8 +432,8 @@ function display_forums($root_data = '', $display_moderators = true, $return_mod
 				'FORUM_DESC'			=> generate_text_for_display($row['forum_desc'], $row['forum_desc_uid'], $row['forum_desc_bitfield'], $row['forum_desc_options']),
 				'FORUM_FOLDER_IMG'		=> '',
 				'FORUM_FOLDER_IMG_SRC'	=> '',
-				'FORUM_IMAGE'			=> ($row['forum_image']) ? '<img src="' . $phpbb_root_path . $row['forum_image'] . '" alt="' . $user->lang['FORUM_CAT'] . '" />' : '',
-				'FORUM_IMAGE_SRC'		=> ($row['forum_image']) ? $phpbb_root_path . $row['forum_image'] : '',
+				'FORUM_IMAGE'			=> ($forum_image) ? '<img src="' . $phpbb_root_path . $forum_image . '" alt="' . $user->lang['FORUM_CAT'] . '" />' : '',
+				'FORUM_IMAGE_SRC'		=> ($forum_image) ? $phpbb_root_path . $forum_image : '',
 				'U_VIEWFORUM'			=> append_sid("{$phpbb_root_path}viewforum.$phpEx", 'f=' . $row['forum_id']),
 			);