Yes, that's it! July 28th, SysAdmin Day! I received only one "Happy SysAdmin Day" today, but I'm very happy! I also sent a few messages to friends and other sysadmins, congratulating them. So, if you didn't hug your sysadmin today, do it as soon as possible, and if he (or she) doesn't like to be hugged, at least say that you appreciate his/her job, that would be nice.
So, I found the necessary courage and sent a message to my AM speaking about this diary and Planet Debian (thanks to Paul Wise to encourage me on that one).