diff --git a/lang/gpxsee_cs.ts b/lang/gpxsee_cs.ts
index 8547d758..a4bf2391 100644
--- a/lang/gpxsee_cs.ts
+++ b/lang/gpxsee_cs.ts
@@ -1348,12 +1348,12 @@
     <message>
         <location filename="../src/GUI/optionsdialog.cpp" line="420"/>
         <source>UTC</source>
-        <translation type="unfinished"></translation>
+        <translation>UTC</translation>
     </message>
     <message>
         <location filename="../src/GUI/optionsdialog.cpp" line="478"/>
         <source>Time zone:</source>
-        <translation type="unfinished"></translation>
+        <translation>Časová zóna:</translation>
     </message>
     <message>
         <location filename="../src/GUI/optionsdialog.cpp" line="500"/>
@@ -1363,7 +1363,7 @@
     <message>
         <location filename="../src/GUI/optionsdialog.cpp" line="509"/>
         <source>Time zone</source>
-        <translation type="unfinished"></translation>
+        <translation type="unfinished">Časová zóna</translation>
     </message>
     <message>
         <location filename="../src/GUI/optionsdialog.cpp" line="524"/>