Just remember, he/she probably has friends and family, just like you. No need to be scared at all, unless of course their hand is resting on their sidearm or something like that. Just stay calm, speak at normal tones, stick to the 3 replies and avoid those kinds of people altogether.

Meditation is great. My 45min morning walks in the gardens with my kids is the best part of my day. We have got to unplug more often, the black mirrors are literally killing us.

Yes, I loved your post about the gregorian calendars, great work! :)