diff --git a/config.default.php b/config.default.php
index a53ef00..ac64fd1 100644
--- a/config.default.php
+++ b/config.default.php
@@ -1,8 +1,13 @@
 <?php
 $conf = [];
 
+// TMB API credentials
 $conf["tmbApi"] = [];
 $conf["tmbApi"]["appId"] = "";
 $conf["tmbApi"]["appKey"] = "";
 
+// Location where the site will save the database file
 $conf["databaseFile"] = "";
+
+// Timezone of the subway system
+$conf["timezone"] = "Europe/Madrid";