I've been reading the recent blogpost "Winding down my Debian involvement" by Michael Stapelberg. Sad details aside, it's been mentioned that within Debian infrastructure batch jobs run four times a day at XX:52 UTC:
When you want to make a package available in Debian, you upload GPG-signed files via anonymous FTP. There are several batch jobs (the queue daemon,
dinstall, possibly others) which run on fixed schedules (e.g.
dinstallruns at 01:52 UTC, 07:52 UTC, 13:52 UTC and 19:52 UTC).
Is there a reason to choose XX:52 UTC exactly and not to use time rounded to the nearest hour, e.g 02:00, 08:00, 08:00 and 14:00?
Should I also start my cron jobs slightly before the new hour starts, or this was a random choice by the Debian team?