diff --git a/plugins/common-aliases/common-aliases.plugin.zsh b/plugins/common-aliases/common-aliases.plugin.zsh
index 75899ca2c..e44554567 100644
--- a/plugins/common-aliases/common-aliases.plugin.zsh
+++ b/plugins/common-aliases/common-aliases.plugin.zsh
@@ -54,10 +54,21 @@ alias unexport='unset'
 
 alias whereami=display_info
 
+alias week='date +%V'
+alias hexdump='hexdump -C'
+
 alias rm='rm -i'
 alias cp='cp -i'
 alias mv='mv -i'
 
+# Use Git’s colored diff when available
+hash git &>/dev/null
+if [ $? -eq 0 ]; then
+    function diff() {
+        git diff --no-index --color-words "$@"
+    }
+fi
+
 # zsh is able to auto-do some kungfoo
 # depends on the SUFFIX :)
 if [ ${ZSH_VERSION//\./} -ge 420 ]; then