#! /usr/bin/env bash

sed -e 's+Sunday+Sun+' \
    -e 's+Monday+Mon+' \
    -e 's+Tuesday+Tue+' \
    -e 's+Wednesday+Wed+' \
    -e 's+Thursday+Thu+' \
    -e 's+Friday+Fri+' \
    -e 's+Saturday+Sat+'