[Unit]
Description=Run briven restore drill on the 1st of every month at 04:30 UTC

[Timer]
# 1st day of each month, 04:30 UTC — well after any monthly close-out
# work and well before any business-hours window in EU/US.
OnCalendar=*-*-01 04:30:00 UTC
Persistent=true
RandomizedDelaySec=900

[Install]
WantedBy=timers.target