# A stopped watch shows correct time ---

You know the old saying

A slow or fast running watch is worse than a stopped (broken) watch. At least the stopped watch shows correct time twice a day!

Here is a challenge:

A person was wearing a stopped (broken) analog wrist watch with hour, minute and second hand, that also displayed the date ( Monday thru Sunday and the day of the month) which showed correct time and day at least 5 times during a continuous 15 hour period.

The person did not touch the watch settings. He was on the ground all this time.

How is this possible?

How is this possible?

Let's suppose you are in a country which observes Daylight Savings Time and border a country which also observes it and is in a time zone which is one hour behind, then you can observe the exact time twice during the clock change and then cross the border to observe it a third time. Cross back and observe the time once more (in 11 hours) in the first country and cross once more to observe the time in the second country.

If all that is confusing, here is an example

Suppose that you are in Ukraine near the border with Poland on Sunday, 27th October, 2019 at 3:30am and your analog watch has stopped with this date and time. This is the first observation.

In 30 minutes, the time in Ukraine "goes back" from 4am to 3am and one hour after the first observation, it is 3:30am again in the Ukraine. This is the second observation.

Next, you cross the border to Poland where the time is 2:30am. Wait for one more hour and your watch is right again, for the third time.

Next, cross back to the Ukraine where the local time will be 4:30am. Wait for 11 hours until the time becomes 3:30pm. Your analog watch doesn't distinguish am/pm so, again, it shows the right date and time, a fourth correct observation.

Finally, cross back to Poland, where the time will be 2:30pm. Wait for one hour and the time will be 3:30pm, making it the fifth occasion where your analog watch will be right, and all within 15 hours.

• Hfvat Vagreangvbany Qngr yvar naq nyybjvat sylvat, pna guvf unccra 6 gvzrf be zber?
– DrD
Sep 15, 2020 at 12:24
• @DrD jryy, erzrzore, lbh'ir chg gur yvzvg bs 15 ubhef fb gur Vagreangvbany Qngr Yvar pna bayl cebivqr fb zhpu uryc, ohg jvgu sylvat lbh pbhyq cebonoyl trg hc gb 15/16. Sep 15, 2020 at 12:28
• Wow. Never thought a stopped watch could be that useful :)
– DrD
Sep 15, 2020 at 12:29
• And just think, if you had a running watch, the watch would be right a maximum of twice...and far more likely, zero times!
– Exal
Sep 16, 2020 at 8:55
• @Stormblessed not sure if you were referring to my " Never thought a stopped watch could be that useful :) " comment. It went back to hexomino's ansswer in rot 13 to my question. Under certain condition -- using International Date Line the stopped watch might even show correct time many more times
– DrD
Sep 16, 2020 at 10:05

Since @hexomino's brilliant answer requires that the clock is stuck on a particular time on a particular date, here's another:

On the day that your clock is stuck on,

find any point where three (or more) time zones meet.

Some suitable candidates (there are many more, try to pick one where you're least likely to get shot at):

The three-country border point between
- South Sudan, DR Congo, and Central Africa
- Norway, Finland, and Russia
- Iran, Afghanistan, and Pakistan
- Belarus, Lithuania, and Poland

* The North Pole (probably doesn't count as "on ground", though)
* The South Pole (might get a bit chilly, so it's good you only have to wait 4 hours here.)

Apart from the last two possibilities, in (or very near) these places a stopped wrist watch will be correct

three times before noon, and three times after it.

• The curiosities of time zones continue to amaze! +1 Sep 15, 2020 at 14:44
• There are places in US (Columbus GA at the border of GA and Alabama, where 2 time zones meet on a street (3rd and 4th). So literally you can have one foot in EST and the other in the CST. Other fact is that Times in US change at 2 AM Sunday all across. So there is that one Common hour between neighboring time zones
– DrD
Sep 15, 2020 at 15:21
• Very logical @Bass. I did not think of all those options.
– DrD
Sep 15, 2020 at 19:10
• Nine times if all of those countries also change their clocks for daylight savings! Sep 16, 2020 at 17:56
• There are apparently places in Russia where three time zones meet. Sep 17, 2020 at 3:57