How often are cell phone watches wrong?

Time change: How your mobile phone adjusts to daylight saving time

Daylight Saving Time: The clock advances one hour from 2:00 a.m. to 3:00 a.m.
Photo: dpa On the night of Sunday (March 25, 2018), the time is switched back from winter time to summer time - more precisely: the clock hands move one hour forward to 3:00 a.m. at 2:00 a.m. Regardless of the much-discussed question about the sense and nonsense of the half-yearly time change and any medical risks for the human organism, readers probably also ask themselves the question: Do I have to manually switch mobile phone alarm clocks, smartphones and computers to summer time myself, or does this happen automatically?

Set automatic time on Android and iPhone

Daylight Saving Time: The clock advances one hour from 2:00 a.m. to 3:00 a.m.
Photo: dpa Most smartphones and cell phones automatically get the time from time servers on the Internet. While you are offline, the last loaded time continues to run in the local clock.

For Android smartphones, the entry "Date and time" can be selected under the menu item "Settings" (the exact menu name and order may vary depending on the mobile phone and OS version). There you can set the date and time to be obtained automatically or to enter them manually. With most cell phones, the time automatically adjusts to daylight saving time in both cases, because you specified "Germany" as the time zone when you set it up. For this purpose, it is stored in the mobile phone that the time zone will change tonight.

The time change works even more safely if you activate the functions "Use automatic time" and "Use automatic time zone", so the time is received from the Internet or from the cellular network, whereby only Telefónica offers the latter. This can be particularly practical when on vacation, because many foreign networks support the feature. This gives you the correct time display immediately at your holiday destination.

With the iPhone, the automatic time can be activated under "Settings", "General", "Date & Time". If necessary, make sure that the correct time zone is specified in the "Time zone" sub-item, but this is usually done automatically.

With older GSM cell phones, the automatic time is mostly only transmitted via the cellular network; the automatic time can also be read out and the relevant entries made using the conventional date and time settings.

For smartwatch users, it is important that the time is normally taken from the smartphone automatically. However, if there are problems with synchronization, the time can usually be corrected manually.

Automatic time change for computers, televisions & Co.

Many other devices also change the time automatically. With Windows, the time change is permanently programmed and does not have to be updated via the Internet. Many internet routers update the time automatically, if necessary, by connecting to a time server. In the case of televisions and set-top boxes, the time change is mostly automatic. However, problems can also arise in these cases, with some devices the time zone must be set or corrected manually from the start. If the automatic time change does not work, the timing service can also be the source of the error. There have been problems with AVM routers as well as older iPhones and Windows Phones in the past.