diff --git a/index.qmd b/index.qmd
index 454f56b331ffa8bb783c31f06bbc5f90126d7e0b..f0c74c3b2d9e22090dbd43d63ea8743d90c3ad3a 100644
--- a/index.qmd
+++ b/index.qmd
@@ -1,11 +1,12 @@
-# R for beginners (2022) {.unnumbered}
+# R for beginners {.unnumbered}
 
-  1. [Introduction to R and RStudio](session1/session_1.html)
-  2. [Introduction to Tidyverse](session2/session_2.html)
-  3. [Transformations with ggplot2](session3/session_3.html)
-  4. [Data transformation](session4/session_4.html)
-  5. [Pipping and grouping](session5/session_5.html)
-  6. [Tidydata](session6/session_6.html)
-  7. [String & RegExp](session7/session_7.html)
-  8. [Factors](session8/session_8.html)
+1. [Introduction to R and RStudio](session_1/session_1.html)
+2. [Introduction to Tidyverse](session_2/session_2.html)
+3. [Transformations with ggplot2](session_3/session_3.html)
+4. [Data transformation](session_4/session_4.html)
+5. [Pipping and grouping](session_5/session_5.html)
+6. [Tidydata](session_6/session_6.html)
+7. [String & RegExp](session_7/session_7.html)
+8. [Factors](session_8/session_8.html)
 
+(2018-2013)