Sunday call, two countries, and the clocks changed in only one of them

The Sunday call has been the same time for two years. Nobody sets a reminder any more; it just happens.

Last Sunday you rang and nobody picked up. You rang again twenty minutes later and your mother said, a little confused, that they had been waiting an hour ago.

Nothing was rescheduled. One country moved its clocks and the other had not yet.

The three weeks nobody warns you about

Countries that observe daylight saving do not switch on the same dates.

• The United States springs forward on the second Sunday in March and falls back on the first Sunday in November.
• The UK and the EU switch on the last Sunday in March and the last Sunday in October.
• Many countries do not switch at all — most of Asia including India, most of Africa, Arizona, Queensland.

So between the second and last Sundays of March, the US has moved and Europe has not: the gap between them is an hour smaller than usual. In late October it happens again in reverse.

For those weeks a standing call is simply an hour out, and then it fixes itself, which is precisely why nobody ever gets round to investigating it.

Why families get hit harder than workplaces

A workplace meeting has an invite in a calendar system that converts automatically. A family call usually has none of that — it lives in habit, and habit does not convert.

It is also frequently between an older generation who do not use calendar software and a younger one who assume the time is obvious. Neither side has a mechanism.

And the emotional reading is not "our clocks differ." It is "they forgot," or "they weren't there" — which is a much worse thing to feel about a weekly call with your parents.

The fix that actually holds

Put it in a calendar with a time zone. One recurring event, created with the other party's city attached, and it converts itself twice a year without anyone thinking about it. This is the whole solution if the technology is available on both ends.

If it is not, anchor to one side and say so. Pick whose clock the call follows — usually the older generation's, since they are less likely to be adjusting — and state it plainly:

"The call is 6pm your time. When our clocks change here, I'll move; you don't have to do anything."

That sentence removes the ambiguity permanently and puts the work on the person better equipped to do it.

Diary the two dates. Mid-March and late October. A single message — "clocks changed here, still 6pm yours?" — prevents the whole thing.

If one of you is somewhere with no DST at all

Then the drift is entirely one-sided, and it is worth understanding which side.

If you are in London and your family is in Mumbai, India never changes; your gap moves because you did. If you are in New York and they are in Manila, same again. In those cases the person who should adjust is unambiguous — the one whose country moved.

Related: I keep calling my parents at the wrong hour · Every March our weekly call moves

Figures on this page are computed from the IANA time zone database. Last generated 2026-08-18.