I mistyped cal with calendar and found such interesting program.

I think it is good to update some important Debian events into this file,
including inaugurate days of DPLs. (neilm, maddog, lamby, hartmans, and
highvoltage), and the day we missed Ian Murdock and several others.

I would consider this issue to be newcomer-friendly since this is
the only file needed to change for the fix (except changelog):

https://salsa.debian.org/meskes/bsdmainutils/-/commits/master/debian/calendars/calendar.debian

I personally would like to add DebConf dates as well, and if there's
any other important dates we need to remember, please also reply to the
issue.

Thanks,
Yao Wei