Daylight savings time is changing

Not to mention the millions of embedded device controllers, some of which are mission critical, as well as mainframes dedicated to the commercial transportation infrastructure. E.g., burglar alarm on/off times, bank vault lock/unlock times, drug delivery systems (in hospitals), train rail-switching systems, airline reservation systems, regional air traffic control center flight-tracking computers, on-board flight computers of every commercial jet, etc.

The last two scare the hell out of me! Imagine flying between the USA and Canada on the day this new switch-over is to start...

Methinks there are going to be a lot of unintended consequences!