LONDON (AP) — For a week every October, people organizing international catch-ups and meetings on both sides of the Atlantic may be briefly confused: Did I just miss that conference call? Why is my grandmother calling me so early?

Most people quickly remember: It’s that strange time each fall when Europe and the United States are out of sync as they switch from daylight saving time to standard time.

Most countries do not observe daylight saving time. And for those that do — mostly in Europe and North America — the date of the clock change varies, partly because of how time-related laws were developed in difference places.

In countries that observe the practice, clocks are set forward one hour from standard time in March to make the most of increased summer daylight hours in the northe

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