I appreciate the cheat sheet. I think the names of the character natures are misplaced.

• Phlegm: phlegmatic
• Yellow bile: choleric
• Black bile: melancholic

Source

Where can this variant of coreutils be found? This is the first time I have heard of it.

mu4e+mbsync+msmtp

The Malazan Book of the Fallen, by Steven Erikson.

I have seen many different ways to achieve that in Emacs. Do you have one to recommend (modes, packages)? Do you synchronise calendars with other devices (e.g. smartphone, server)?

obligatory xkcd