diff --git a/client/src/locales/index.js b/client/src/locales/index.js
index a83ed24e..caa9d44f 100644
--- a/client/src/locales/index.js
+++ b/client/src/locales/index.js
@@ -4,7 +4,6 @@ import en from './en/embed';
 import de from './de/embed';
 import pl from './pl/embed';
 import ru from './ru/embed';
-import pl from './pl/embed';
 
 const localePairs = [
   ['en', en],
diff --git a/client/src/locales/pl/core.js b/client/src/locales/pl/core.js
index c3f1366b..3b854397 100644
--- a/client/src/locales/pl/core.js
+++ b/client/src/locales/pl/core.js
@@ -1,4 +1,8 @@
+import dateFns from 'date-fns/locale/pl';
+
 export default {
+  dateFns,
+
   format: {
     date: 'd/M/yyyy',
     time: 'p',