I have a digital watch and i cant change the time and also in try to do so i have it beeping at me sometimes. the number on it is 450 f8 14 pur

Use the manual to set the correct time zone, time and date. Manual is available on the Casio worldwide website>support>manual>watches.
Have the module number at hand: you will enter it to find the manual. The module number is a 3 digit or 4 digit number on the back of the watch.

Hi,

To set time, date, and options:
1) With time and date showing, press and hold SET.
2) Current time zone (1, 2, or 3) flashes. Press + or – to select time zone to set, if desired.
3) Press NEXT. Hour flashes. Press + or – to change hour (including AM/PM); hold button to scan values
4) Press NEXT. Minutes flash. Press + or – to change minutes
5) Press NEXT. Seconds flash. Press + or – to set seconds to zero.
6) Press NEXT. Month flashes. Press + or – to change month.
7) Press NEXT. Day flashes. Press + or – to change day.
8) Press NEXT. Year flashes. Press + or – to change year.
9) Press NEXT to set options. Press + or – to change value and then press NEXT to go to next option. Press DONE at any
step to exit and save settings. Available options are 12- or 24-hour time format, MM-DD or DD.MM date format, hourly
chime N, beep for button presses, customizable mode set (Select “HIDE” for unwanted modes – they are removed
from mode sequence).


Timex has two ways to find information about your particular watch. Some of these models only have a guide consisting of a few pages. If you don't have the manual, Try this link:

Complete Timex link site:
http://www.timex.com/info/Product_Instruction_Guides_Downloads

Now, look up the model number, or if you cannot find that, check the three-digit Module Number from the back of the watch. Click on it in the Module Table, and download a PDF of your watch setting-instructions/manual.


If you need further help, call Timex in Little Rock, Arkansas, phone 1-800-448-4639.

I hope this helps you. Thanks, Bill

First, go to the time mode which displays week day, seconds and timeas opposed to calendar, seconds and time. To do so, touch and hold upper left sensor until the watch beeps. Then use the upper right button to switch to the proper time mode. Then touch and hold lower right sensor. This will send the watch into settings mode.

Click on my profile (escapement), then click on Tips and Tricks. There you will find link to all NIKE watch manuals.Rate me, please.

I have looked at their web site and cannot identify your watch from the number given, as they do not give numbers to their models.

The only thing that may change between countries is the transmission frequency of the radio timing pulses. (This assumes that your watch is an "atomic accuracy" type, which registers local transmitters.)

If this is not the case, then your watch is in the same class as those that work accurately when being worn but not when they are taken off (or vice versa). A mystery all round!

1. Locate the screw on the side of the watch face. This screw is what you will use to set the time on your watch. Water-resistant watches have a screw-type crown, and the screw must be turned toward the body (unscrewed) before it can be pulled out for further use. If the watch is not water-resistant, the unscrewing is unnecessary.
   
2. 2 Pull the screw gently outward. The screw can be pulled outward in two positions. The first position sets the date and day. Pull the screw out farther (into the second position) to set the time.
   
3. 3 Turn the screw either clockwise or counterclockwise to move the minute and hour hands to the desired time. Push the screw all the way in (and turn it away from the body if you have the water-resistant model) when you are finished.
   Digital Watch
4. 1 Locate the three buttons on the side of the watch face. These are the buttons used to set the time. The top button is the "+" indicator for increasing the numbers. The bottom button is the "-" indicator for decreasing numbers. The center button is to activate the setting mode.
   
5. 2 Press the center button in for one second. The watch will beep.
   
6. 3 Press the top "+" button for two seconds. After the watch beeps, you can begin setting the time.
   
7. 4 Press either the "+" button or the "-" button (depending on whether you want to increase or decrease the numbers) to set the time.
   
8. 5 Press the center button when you are finished. The watch will beep. This validates the setting. The seconds will revert to zero.
   

Read more: How to Change the Time on Tissot Watches ' eHow.com http://www.ehow.com/how_5934972_change-time-tissot-watches.html#ixzz14ifvni46

This is the tried and tested solution from this very nice gentleman. Many thanks to him (Ha Bi):

1. Press and hold on to the T button until it beeps
   
2. Touch the middle of the screen to change digital display to unit selection
3. Press and hold the T-button until "Synchronize" comes up in the digital display
4. Use the + button and - button to align the hour and minute hand to 12:00.
5. Click on the T-button again. Congrats, you're done!
6. Enjoy~

Must see blog for all T-touch users

http://myhabi.blogspot.com/2008/10/tissot-t-touch-battery-change.html

hi, you just go to the time option and when your on it. you hold on the right bottom hand button 4 5 secs, then the first part of time should beep and then using the top right hand button you keep clinking it until you chnge the hour time, then press the right bottom hand button once to make the mintues beep and then using right top button you change the mintues and press the right bottom button to cofirm and then you can get out of it. rate me.

I think I have the same watch and was just looking here to see if I could find how to stop the alarm going off every hour! However, I think I do know how to change the time: press the mode button three times (the first one brings up something like the stopwatch, the second brings up what may be an alarm time). On the third press you should get the time appearuing with the seconds flashing on the far right of the display. You can then change the second by pressing the"start" button. To change the minutes or hours, oress the "reset" button until they start flashing and use the start button again. pressing the reset button again will bring up the date to change. keep pressing until nothing is flashing any more and poress mode and it should bring you back to the current time. hope you can follow this and it works!

SET TIME:
1. Activate Crystal
2. Tap center of screen until digital time comes up
3. Press and hold top button (+) until watch beeps, display will be flashing
4. Use + and – key to adjust time. If several hours off, hold appropriate key and
after first hour passes, only the hour hand will move.
5. Make sure the digital display shows A or P for AM or PM
6. When finished, touch center of screen again.

SET DATE:
1. Activate Crystal
2. Tap center of screen until date appears
3. Press and hold top + button until watch beeps and display flashes.
4. Use + and – buttons to change date to correct one.
5. Make sure to set time first, if you set date first, you run the risk of the date
changing at noon rather than midnight.