diff --git a/src/locales/en.json b/src/locales/en.json
index d976578..c4f39f5 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -85,7 +85,7 @@
     "search-driver": "Driver name",
     "search-dispatcher": "Dispatcher name",
     "search-station": "Scenery name",
-    "search-date": "Timetable date",
+    "search-date": "Timetable date (CEST / GMT+2)",
 
     "sort-mass": "mass",
     "sort-speed": "speed",
diff --git a/src/locales/pl.json b/src/locales/pl.json
index 7459d9d..71e7316 100644
--- a/src/locales/pl.json
+++ b/src/locales/pl.json
@@ -87,7 +87,7 @@
     "search-driver": "Nick maszynisty",
     "search-dispatcher": "Nick dyżurnego",
     "search-station": "Nazwa scenerii",
-    "search-date": "Data rozkładu jazdy",
+    "search-date": "Data rozkładu jazdy (czas polski)",
 
     "sort-distance": "kilometraż",
     "sort-total-stops": "stacje",