[Unit]
Description=Nightly Petal database backup (millenia)

[Timer]
OnCalendar=*-*-* 03:20:00
# The box is not on 24/7; without this a missed window would just be skipped
# and the backup would silently never run.
Persistent=true
RandomizedDelaySec=300

[Install]
WantedBy=timers.target