I put a new battery in my timex WR50M and it is an hour ahead on

Select a city that has Eastern timezone, such as Indianapolis.

try this link below
http://assets.timex.com/manuals/?timexBrand=core

Buttons are numbered as followed:
Start/Stop is button 1
Lap/Rst is button 2
Indiglo is button 3
Mode is button 4

a) Press 4 to select "TIME" mode
b) Press 2 and hold for 2 sec to select "SET" mode, second digits blink.
c) Press 1 to reset digits to 00.
d) Press 4. Minute digits blink
e) Press 1 to set minutes.
f) Press 4. Hour digits blink.
g) Press 1 to set hours.
h) Follow same patter to set day of month, month, etc...
i) Press 2 at any time to retain set values and exit procedureSource(s):Timex instruction manual

mcdevito75 here, You re-set the time in a different time zone the same way as you do for the time zone your in now. The different time zones in the USA ru from 1 to 3 hours before the time in the Eastern part of the USA, example, Eastern time 3 PM, then going West, you have Central time 1 hour before, then Mountain time, 2 hours before , then Pacific time 3 hours before eastern time.

http://www.timex.com/info/Product_Instruction_Guides_Downloads

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

Good day Sir, This model (WR50M) has four buttons, from left to right, top to bottom: 1) Set; 2) Start/Stop; 3) Mode; and 4) Indiglo.

To set or change the time:

1.Press and hold Set and Start/Stop simultaneously; the seconds will start to blink

2.Release both buttons
Use Mode button to toggle through to Hours, Minutes, etc.

3.When desired number (such as Hours/Minutes) starts to blink, use Start/Stop button to change number

4.When done, hit Set

have a nice day.

Solution #2 by Guest, posted on May 13, 2008 solved my problem. OUTSTANDING solution #2!

1. Hold in the MODE button until the alarm time appears.

2. VERY IMPORTANT - release and TAP the MODE button AGAIN, and the time should appear with the seconds flashing.

3. Use StART/Stop to choose among seconds, hours, and minutes, and

4. Use ADJUST to increase the selected number

5. Press MODE to put the thing back in regular operational mode.

After several attempts with other directions over the last four months, these 5 steps WORKED.

Hold down the adjust button bottom right then press the mode button top left you will notice the a or p that stands for am/pm will disappear & reappear. If you have an a or p on your display then you are out of military time.

1. Press and hold the mode button until it starts to blink, then release.
   
2. First the alarm time will come up.
   
3. Press the mode button once to get to the time and date.
   
4. The seconds will flash first. 
   
5. Press the st/stop button to toggle between the seconds, hour, minutes, date (month and day) and day of the week.
   
6. Press the lap/reset button to change the values.
   
7. When done, press the mode button again to return to normal.