Starting batch jobs at exact time slightly before the new hour starts

I've been reading the recent blogpost ["Winding down my Debian involvement"](https://michael.stapelberg.ch/posts/2019-03-10-debian-winding-down/) 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, unchecked, dinstall, possibly others) which run on fixed schedules (e.g. dinstall runs 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?