Design a calendar UI which is able to display a 1 hour meeting which starts at 3 AM and ends at 3 AM (and takes place during the DST changeover)

It's March 2nd, 1943. Your user is in Arizona and using your software to plan a meeting with a customer in California. The user asks you to "schedule a meeting with Acme Corp for 9 AM on the first Friday of next month".

California and Arizona are in different time zones.

Between now and then, California will begin daylight savings time as scheduled on March 8th, but Arizona doesn't do DST so they'll stay behind. However, on April 1st, the governor will sign an emergency order moving Arizona to DST, effective immediately.

By the way, on the day of the meeting, the user will have driven to the Navajo reservation to join some colleagues for the phone call. They /do/ use DST in that part of Arizona. Mostly, some parts don't.

You are to (1) correctly display this meeting in your calendar UI for both participants, (2) send an email to Acme Corp with the meeting details, and (3) notify both users when the meeting is about to begin.

Good luck!

Bonus: for whatever reason, on March 28th the user asks you to tell it how many hours remain until the meeting. We'll assume that they have to top off the fuel in the engine which is the subject of the meeting and it has to be running until then.

Read this for more ideas: https://mm.icann.org/pipermail/tz-announce/

Bonus two: the borders of the Navajo nation are defined by a river

(haha j/k, but imagine)