diff --git a/README.md b/README.md
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+++ b/README.md
@@ -14,8 +14,9 @@ The images are licensed as [cc-by 4.0](ihttp://creativecommons.org/licenses/by/4
 ./build
 ```
 
-Months and weekdays are in german, if you want to change that take a look at the `pgfcalendarmonthname` definition in `calendar.tex` and the `day letter headings` in `calpage.sty`.  
+Months and weekdays are in german, if you want to change that take a look at the `pgfcalendarmonthname` definition in `calendar.tex` and the `day letter headings` in `calpage.sty`. For holiday definitions, take a look at the end of `calpage.sty`.
 I will make that easier to configure in a future version.
 
 You'll find the generated pdf in a folder called `out`
 
+![a screenshot of december](screenshot.png)
diff --git a/screenshot.png b/screenshot.png
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Binary files /dev/null and b/screenshot.png differ