diff --git a/dev/tools/github_authors_and_commits_bydate.sh b/dev/tools/github_authors_and_commits_bydate.sh
new file mode 100755
index 00000000000..7013854c093
--- /dev/null
+++ b/dev/tools/github_authors_and_commits_bydate.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+#
+# Count number of different contributors and number of commits for a given year or month
+# Can be used for statistics (for example to generate the infography of the year)
+#
+# shellcheck disable=2027,2086,2268
+
+echo "***** github_authors_and_commits_bydate.sh *****"
+if [ "x$1" = "x" ]; then
+	echo "Usage: $0  (byyear|bymonth)  YEARSTART  [YEAREND]"
+	exit
+fi
+if [ "x$1" != "xbyyear" -a "x$1" != "xbymonth" ]; then
+	echo "Usage: $0  (byyear|bymonth)  YEARSTART  [YEAREND]"
+	exit
+fi
+
+FROM=$1-01-01
+TO=$1-12-31
+DATEFORMAT="%Y"
+if [ "x$1" = "xbymonth" ]; then
+        DATEFORMAT="%Y%m"
+fi
+
+if [ "x$3" != "x" ]; then
+	TO=$2-12-31
+fi
+
+echo "--- Number of different contributors for the year"
+echo "git log --since $FROM --before $TO | grep ^Author | awk -F'<' '{ print $1 }' | iconv -f UTF-8 -t ASCII//TRANSLIT | sort -u -f -i -b | wc -l"
+git log --since $FROM --before $TO | iconv -f UTF-8 -t ASCII//TRANSLIT | grep '^Author' | awk -F"<" '{ print $1 }' | sort -u -f -i -b | wc -l
+
+
+echo "--- Number of commit $1"
+echo "git log --pretty='format:%cd' --date=format:'$DATEFORMAT' | sort | uniq -c | awk '{ if (\$2 >= '"$1"') { print \"Year: \"\$2\", commits: \"\$1 } }'"
+git log --pretty='format:%cd' --date=format:"$DATEFORMAT" | iconv -f UTF-8 -t ASCII//TRANSLIT | sort | uniq -c | awk '{ if ($2 >= '$1') { print "Year: "$2", commits: "$1 } }'
diff --git a/dev/tools/github_authors_and_commits_peryear.sh b/dev/tools/github_authors_and_commits_peryear.sh
deleted file mode 100755
index 421705bcdee..00000000000
--- a/dev/tools/github_authors_and_commits_peryear.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/sh
-#
-# Count number of different contributors and number of commits for a given year.
-# Can be used for statistics (for example to generate the inforgraphy of the year)
-#
-# shellcheck disable=2027,2086,2268
-
-if [ "x$1" = "x" ]; then
-	echo "Usage: $0 YEARSTART [YEAREND]"
-	exit
-fi
-
-
-FROM=$1-01-01
-TO=$1-12-31
-
-if [ "x$2" != "x" ]; then
-	TO=$2-12-31
-fi
-
-echo "--- Number of contributors for the year"
-echo "git log --since $FROM --before $TO | grep ^Author | awk -F'<' '{ print $1 }' | iconv -f UTF-8 -t ASCII//TRANSLIT | sort -u -f -i -b | wc -l"
-git log --since $FROM --before $TO | grep '^Author' | awk -F"<" '{ print $1 }' | iconv -f UTF-8 -t ASCII//TRANSLIT | sort -u -f -i -b | wc -l
-
-
-echo "--- Number of commit for the year"
-echo "git log --pretty='format:%cd' --date=format:'%Y' | sort | uniq -c | awk '{ if (\$2 >= '"$1"') { print \"Year: \"\$2\", commits: \"\$1 } }'"
-git log --pretty='format:%cd' --date=format:'%Y' | sort | uniq -c | awk '{ if ($2 >= '$1') { print "Year: "$2", commits: "$1 } }'
diff --git a/dev/tools/github_commits_perversion.sh b/dev/tools/github_commits_byversion.sh
similarity index 92%
rename from dev/tools/github_commits_perversion.sh
rename to dev/tools/github_commits_byversion.sh
index 7c5892f60c1..6354f7d9253 100755
--- a/dev/tools/github_commits_perversion.sh
+++ b/dev/tools/github_commits_byversion.sh
@@ -37,7 +37,7 @@ do
 	echo "Checkout into version $i"
 	git checkout $i
 	#git shortlog -s -n  --after=YYYY-MM-DD --before=YYYY-MM-DD | tr '[:lower:]' '[:upper:]' > /tmp/github_commits_perversion.txt
-	git shortlog -s -n $commitidcommon.. | tr '[:lower:]' '[:upper:]' > /tmp/github_commits_perversion.txt
+	git shortlog -s -n $commitidcommon..  | iconv -f UTF-8 -t ASCII//TRANSLIT | tr '[:lower:]' '[:upper:]' > /tmp/github_commits_perversion.txt
 	#cat /tmp/github_commits_perversion.txt
 	echo "Total for version $i:"
 	echo -n "- Nb of commits: "
diff --git a/dev/tools/github_lines_perusers.sh b/dev/tools/github_lines_byuser.sh
similarity index 68%
rename from dev/tools/github_lines_perusers.sh
rename to dev/tools/github_lines_byuser.sh
index 4f3a211c315..8bc5802aa2f 100755
--- a/dev/tools/github_lines_perusers.sh
+++ b/dev/tools/github_lines_byuser.sh
@@ -20,7 +20,7 @@ if [ "x$START" = "xSTART.." ]; then
 fi
 
 echo "git log $START$2 --shortstat | grep ... | perl ... > /tmp/github_lines_perusers.tmp"
-git log $START$2 --shortstat | grep -e 'Author:' -e 'Date:' -e ' changed' -e ' insertion' -e ' deletion' | perl -n -e '/^(.*)$/; $line = $1; if ($line =~ /(changed|insertion|deletion)/) { $line =~ s/[^0-9\s]//g; my @arr=split /\s+/, $line; $tot=0; for (1..@arr) { $tot += $arr[$_]; }; print $tot."\n"; } else { print $line."\n"; };' > /tmp/github_lines_perusers.tmp
+git log $START$2 --shortstat | iconv -f UTF-8 -t ASCII//TRANSLIT | grep -e 'Author:' -e 'Date:' -e ' changed' -e ' insertion' -e ' deletion' | perl -n -e '/^(.*)$/; $line = $1; if ($line =~ /(changed|insertion|deletion)/) { $line =~ s/[^0-9\s]//g; my @arr=split /\s+/, $line; $tot=0; for (1..@arr) { $tot += $arr[$_]; }; print $tot."\n"; } else { print $line."\n"; };' > /tmp/github_lines_perusers.tmp
 
 echo "Users and nb of lines";
 cat /tmp/github_lines_perusers.tmp | awk 'BEGIN { FS="\n"; lastuser=""; } { if ($1 ~ /^Author:/) { sub(/<.*/, ""); lastuser=tolower($1) }; if ($1 ~ /^[0-9]+$/) { aaa[lastuser]+=$1; } } END { for (var in aaa) print var," ",aaa[var]; } ' | sort