Approval in backend

backend/cs/calendar.json

@@ -1,9 +1,9 @@
 {
     "calendar": {
-        "all_calendars": "All calendars",
-        "exhibition_starts": "Exhibition starts",
-        "exhibition_ends": "Exhibition ends",
-        "loan_starts": "Loan starts",
-        "loan_ends": "Loan ends"
+        "all_calendars": "V\u0161echny kalend\u00e1\u0159e",
+        "exhibition_starts": "Za\u010d\u00e1tek v\u00fdstavy",
+        "exhibition_ends": "V\u00fdstava kon\u010d\u00ed",
+        "loan_starts": "Zah\u00e1jen\u00ed p\u016fj\u010dky",
+        "loan_ends": "Konec p\u016fj\u010dky"
     }
 }