diff --git a/.bash_aliases b/.bash_aliases
index 89934f7..b91ab11 100644
--- a/.bash_aliases
+++ b/.bash_aliases
@@ -65,7 +65,10 @@ alias gst='git status'
 alias gp='git push'
 # git activity per week day:
 # git log --pretty='%at' | while read d; do date -d "@$d"; done | awk '{print $1}' | sort | uniq -c
-alias ga='git log --pretty='"'"'%at'"'"' | while read d; do date -d "@$d"; done | awk '"'"'{print $1}'"'"' | sort | uniq -c'
+alias gad='git log --pretty='"'"'%at'"'"' | while read d; do date -d "@$d"; done | awk '"'"'{print $1}'"'"' | sort | uniq -c'
+# git activity per hour of the day:
+# git log --pretty='%at'  | while read d; do date +%H -d "@$d"; done | sort | uniq -c
+alias gah='git log --pretty='"'"'%at'"'"'  | while read d; do date +%H -d "@$d"; done | sort | uniq -c'
 
 # mercurial coloured diff
 alias hgd='hg diff | colordiff -y | less -R'