add timeformat var

bashrc

@@ -94,6 +94,9 @@ echo
 ( ! with_coreutils && isdarwin ) || iswindows || _timeoption=" --time-style=long-iso"
 ( ! with_coreutils && isdarwin ) || _hideoption=" --hide=[A-Z]*" # do not use
 
+_timeformat_iso="%Y-%m-%dT%H:%M:%S%z"
+_timeformat_rfc2822="%a, %d %b %Y %T %z"
+
 alias ls="ls -hCF${_coloroption}${_timeoption}"
 # export GREP_OPTIONS=""
 alias grep="grep -n${_coloroption}"