diff --git a/os2/header.md b/os2/header.md
index 0f047a6..7f8be78 100644
--- a/os2/header.md
+++ b/os2/header.md
@@ -2,7 +2,7 @@
 title: OS2 kolokvijumi
 author: pripremili Luka Simić i Aleksa Marković
 subtitle: kategorisani zadaci sa kolokvijuma 2006-2021 sa stranice predmeta
-date: Oktobar 2021
+date: Novembar 2021
 geometry: margin=2cm
 output: pdf_document
 classoption: twoside