diff --git a/app.js b/app.js
index 89ac040..26b65b5 100644
--- a/app.js
+++ b/app.js
@@ -31,8 +31,12 @@ function vypocitatCas(vojsl) {
   let min = d.getMinutes();
   if (min > 25 && min < 55) {
     min = 0;
-    hod = hod == 23 ? 0 : hod + 1;
-    c = new Date(c.getDate() + 1);
+    if (hod == 23) {
+      hod = 0;
+      c = new Date(c.getDate() + 1);
+    } else {
+      hod++;
+    }
   } else {
     min = 30;
   }