internet-access-schedule-off.timer

[Unit]
Description=Turn access to dns off

[Timer]
OnCalendar=Sun 19:00:00
OnCalendar=Mon 19:00:00
OnCalendar=Tue..Thu 19:00:00
OnCalendar=Fri 19:00:00
OnCalendar=Sat 19:00:00
Persistent=true

[Install]
WantedBy=timers.target