diff --git a/README.md b/README.md
index 41949a8..23cf149 100644
--- a/README.md
+++ b/README.md
@@ -16,4 +16,5 @@ sudo cp gitistics.sh /usr/local/bin/gitistics
 | -h | show this help page |
 | -u <user/regex> | set a repository username or a regex pattern (brackets etc. must be escaped with \ ) |
 | -r <directory>  | set a directory with your repositories |
+| -s <date> | set the startdate (e.g. 01 JAN 2018 or 1 month ago) where the stats should start |
 | -v | show verbose output |
diff --git a/gitistics.sh b/gitistics.sh
index 7a16025..5e7354c 100755
--- a/gitistics.sh
+++ b/gitistics.sh
@@ -119,7 +119,7 @@ print_usage() {
   echo "-h                  show this help page"
   echo "-u <user/regex>     set a repository username or a regex pattern (brackets etc. must be escaped with \ )"
   echo "-r <directory>      set a directory with your repositories"
-  echo "-s <date>           set the date (e.g. 01 JAN 2018) where the stats should start"
+  echo "-s <date>           set the startdate (e.g. 01 JAN 2018 or 1 month ago) where the stats should start"
   echo "-v                  show verbose output"
 }