Thank you marc and fernando (fernando, I think your replies go only to marc and not to the group).
So it seems the conclusion is timers can't achieve both 1. Run only once a day even if you boot often. 2. Not starting for at least 10 minutes after boot I realize that you can achieve 2 outside the timer by having services fired by the timer begin with a 10 minute delay. However, I thought timers were supposed to achieve 1 & 2, since that is what I believe you get with vixie-cron + anacron. Also, since systemd.cron is based on timers, I would think it would have the same problem we are discussing. allan