crontab 0 0 * * 0 wget --mirror http://www.gnu.org/ -o /home/me/weeklog
wget --mirror --convert-links --backup-converted \ http://www.gnu.org/ -o /home/me/weeklog
wget --mirror --convert-links --backup-converted \ --html-extension -o /home/me/weeklog \ http://www.gnu.org/
Or, with less typing:
wget -m -k -K -E http://www.gnu.org/ -o /home/me/weeklog