If a meeting was scheduled at 9 Am Central time with team members who are in France. What time is it for them? (it's 4 pm).
Now, the American clocks change. That meeting still happens at 9 AM CST. But...the French clocks are the same time they were. The meeting is still scheduled at 4 PM their time.
So, they're showing up at 4 PM their time only to find the Americans had already been in the meeting for an hour.
Want to know how I know this happens? Because I work in corporate 'Murica with offices in London & Paris. And every time the clocks change, this happens.