My watch is changing date at 2 am instead of at midnight, i have tried rechanging it manually, but still each day at 2 am it changes the day again. Why it not change at 12am O'clock what I can do pls

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.

follow these instructions off the manual below if you set the watch in wrong sequens it wont change at 12 oclock
http://support.casio.com/en/manual/009/qw5125.pdfhttp://support.casio.com/en/manual/009/qw5125.pdf

Your watch is 12 hours out, as it "thinks" that midnight is midday.

The solution is to wind your watch forward 12 hours and then the date will change at midnight.

Your watch is 12 hours out of step.

The date changes every second time the hour hand passes 12 O'clock.

Your watches' second pass is at midday instead of midnight, so to make it operate correctly, you need to wind it on 12 hours. The date will then change at midnight.

Your watch is 12 hours out of step. (The date changes every second revolution of the hour hand.)

Wind your watch forward 12 hours, (you may have to reset the date) and it will then change around midnight.

Your problem is caused by the fact that the watch is 12 hours out of step.

Wind your watch forward 12 hours, reset the date if you need to and you watch will then change around midnight.

(if you need to change the date more than one day, when it has past the change time, wind it back and then forward to step the date forward. You may have to experiment to see how far past the change point (in both directions).

You are very observant! Timex watches don't have a way to adjust the day.
However, if you turn the hands clockwise you will see the day advance.
So, heres the secret, follow exactly:
1. Turn the hands until the day of the week shows the day before. If today is Wednesday then turn the hands until the watch shows Tuesday
2 Adjust the date to the day before. If today is the 17th then adjust it to the 16th
3. Now pull the crown all the out and and advance the hands until the date changes to the correct date, 17 in this example. This happens at midnight. Continue the movement in a clockwise direction for a few more hours and you should see the day change to the correct day.
4. Now continue to move in a clockwise direction until you have the current time. Remember that your date/day changed at midnight so if the current time is after lunch(noon) you must continue past noon to get to the correct time. If you don't do this correctly your date will change every day at noon instead of midnight.
If you don't succeed the first time, try, try again! Good luck, Michael, Watchmaker to the Stars!

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!

The date changes hen the hour hand passes midnight (more or less).

To change the date for more than one day wind it past midnight and when the date has changed, turn the time back past midnight and then forward again.

You may have to experiment to find out how far back before midnight you have to go before going forward again, but at least you don't have to wind it 24 hours for each day!

The Skagen watches have  two-step stem; fully pulled out will change the time and partially pulled out will change the date (only goes one way so try turning it counter-clockwise or clockwise - I forget which is correct).  It's easier to find the date length by extending it all the way and then go back toward the case.  It won't change the date if you run it through a 24-hour cycle - you have to do the half-way thing.  Hope this helps.