The day inscription is two days late, monday, watch says saturday

Welcome to Fixya.

Hello Helen,

The pre-defined dates that is in your digital watch has reached its end date already. The calendars of old digital watches are pre-defined. It means that the whole calendar let's say for 15 years is stored in your watch. It is where the watch gets its data as you set it. You might have set the date correctly with the year 2011 but your watch's pre-defined calendar might be up to 2010 only since it is an old digital watch and that is the reason why it does not show the correct day anymore.

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Thank you for using Fixya. Have a great day.

If the watch is two days behind, then it has to be set to the current day and date.So that it functions properly.------- In most of the cases it can be set.But in some rare cases it cannot be set.But still give exact watch brand and model number.Also how old it is.Also how many side buttons it has.So as per that exact procedure can be provided and you can try it.------ Keep updated.Thanks.Helpmech.

So to change the Day and Date of your Watch, slowly pull the Stem out... (Do note that if you have a Waterproof Watch, you'll need to unscrew the Stem counter-clockwise, which is towards you, until it unlocks, then you can pull the Stem out!) But this is where you need to go slow. If you pull it out slowly you should hear one snap. (It stops on the first notch) If you pull the Stem out all the way, it snaps twice and ends up on the second notch. (See picture below) The second notch, or all the way out, is where the Stem needs to be to set the Time.
But the first notch, or first snap, is the secret and the key to setting the Day and Date! In the first notch position, you'll see that if you spin the Crown one way, it will change the Day. Spin it in the opposite direction and it changes the Date!
Do keep in mind that you may have to spin the Day and Date a couple rotations because it most likely will alternate between English and Spanish. Just pick the correct Language for you and it's done! When the Day and Date are set, push the Stem in all the way and enjoy your Watch!
If you still have the problem with your Watch changing Dates at Noon instead of Midnight, that just means you're on the wrong 12 hr cycle. (It's set for Twelve at Night instead of Twelve at Noon) All you need to do is pull the Stem all the way out, (second notch) and Spin the Minute and Hour hands ahead 12 hours. If it's Twelve O'Clock, spin it ahead until it's Twelve O'Clock again. Doing that will put the Watch on the correct 12 hour cycle.