[Unit]
Description=Synchronise calendars with calcalist every 15 minutes

[Timer]
OnBootSec=2m
OnUnitActiveSec=15m

# No Persistent=: it only has an effect on OnCalendar= timers, and these are
# monotonic. OnBootSec= already covers the case it would be wanted for, which is
# catching up shortly after the machine comes back.

# Spreads requests instead of every installation calling Google on the quarter
# hour. Google's Calendar API quota is per project and enforced per minute, and
# its own guidance is to randomise timing rather than to burst.
RandomizedDelaySec=120

[Install]
WantedBy=timers.target