I have a wittnauer longlife 100 meter watch that always rolls the date at the wrong 12 hour interval. I change the date at 1201 am or 1201 pm and have tried to do all sorts of things to the same end. I took it in to get the battery replaced, but this model does not have a battery. I think that the whole back acts as a battery. The back just states TTC longlife stainless steel back, water resistant, 3 atm.

probably because you have it set to 12 pm midnight and not 12 noon so at 12 noon it is actually midnight when the date will change
reset the time of the day to am or pm and any pm settings will change the date at 12 midnight.

Hi.
I take it that your watch changes date at 12 noon, instead of 12 midnight.
If so change the time of your watch 12 hours, so it reads the same time, but instead of am, it is pm, or visa versa. Analog watches do not have a 24 hour time setting.

Your watch is 12 hours out of step.The date changes ever second rotation of the hour hand.

If you advance the time 12 hours, the date will change at midnight.

You may have to re-set the date.

Hello,
This is because you have reversed am with pm.
Set your watch 12 hours back and the problem should be solved.
You might want to wait till midnight or noon to check it's fine.

Note: if you see the day shows the previous day rather than the present day, you have to set the clock 24h ahead.
Problem solved!

If you change the date between those hours, and the watch is set for the correct time, it may automatically roll the date forward yet again. It could mess up the internal mechanism for changing the date. The date starts to change around 11:45 PM and can take a good long while for it to fully "engage" the new date, which is why they say to wait til 2:00 AM. The internal mechanics that change the date are very sensitive. If you force it to change the date while it is automatically trying to change it, it can off-set the little gears and they may not function correctly in the future. So just make sure the time on the watch is not between 11:45 PM and 2:00 AM when you change it. The best thing to do is to change the date to the day PRIOR to the day you want (for example today is the 21st, set it to the 20th, then advance the hour / minute hands past midnight so it automatically rolls into the 21st, and then you will know if you are on AM or PM).....

But just avoid setting it between 11:45 PM and 2:00 AM as they mention.


Please make sure you rate my answer 4 thumbs up, it is extremely important to me. I would be forever grateful if you could do so. If you need more help on this question please just respond to my answer here and I will get right back to you.


Thanks
Tim

mcdevito75 here, Many Casio Watch Models out there, I'll bet however your Casio is displaying say 1 AM rather than 1 PM as it should if the time is indeed PM after 12 noon, if so, this is why the date is changeing at 12 PM rather than, 12 AM simply re-set your casio and make sure the time of day is set at PM for time after 12 noon and AM for time anywhere before 12 NOON. Also, as you set your Casio, look for anything that may give the hint of Military time, this may be revilled as 12 hours or 24 hours, if you have anything like this, make sure it's set for 24 hours. If you have additional problems, visit a small watch repair shop in your area. Again there are many, many Casio models out there and without your watch with me it's difficult to be more accurate.

Hi,

Check that you have set the time at the correct AM or PM setting. If this setting is wrong it may appear that the date is changing in 12 hours because it sees 12 midday as 12 midnight.

If this resolves the issue please do take a moment to rate my answer. If not please use 'Add comment' or 'Continue with this Expert' to post up the details. I will be happy to respond.

Thanks for using FixYa.

Ahh, you have one of those watches that have a long battery life. This watch has a lithium iodine battery, which power pace makers. Here's the name of it:
Wittnauer Longlife 6600 mens watch stainless steel watch.

mcdevito75 here, The manufacturer recommends you don"t try to change the date between certain hours as this could hurt the date changeing mechanism inside the watch, I don"t think you did any harm (LUCKY) and the date changeing 45 minutes before mid nite is just about right. BUT! if the date change was aliitle closer to mid nite at 1 time you can try to reset the date, here"s how, your stem should have 2 positions to change the date without haveing to cycle the watch the 24 hours 60 times. Slip a finger nail just under the crown and gently, gently lift the crown to it:s first position, it may take a little practise but you"ll get it, once you do, trun the crown and you should see the DATE change, if so set the DATE to 1 DATE before the DATE you want, now pull the stem out and set the correct gate and time of day. Your watch is now reset and date will change on time, around nid nite.

thats because analog watches don't know the difference between AM/PM. First reset the time, moving the hour and minute hands another 12 hours will let you know exactly what mode its in (am/pm) first allowing you to set the date correctly.