How do i reset a wave ceptor watch to the correct (GMT) time?

Try this:-

First set the watch to 24 hour format rather than 12 hour format.

G in combination with 0.0 is the GMT (Greenwich Mean Time) or UTC.

Nothing you can do. Where you work (middle east) there is no time signal radio station for your (radio controlled) wave ceptor watch.
You can read more here:
http://en.wikipedia.org/wiki/Casio_Wave_Ceptor

I know this an old thread but... What anonymous above said... Go into hand settings mode and set all hands to 12 then press A to exit... Have a good read of the hand setting section in the manual how to do this and it will become clear.. Your time should be correct after this, if it's still out make sure your GMT offset is correct and update the time via radio control. All should be well. It's kind of complicated but once you've done it it's easy!
One thing about this watch that's annoying.. It doesn't seem to have an hourly chime ??

My Wave Ceptor also reset to 01/01/05 four days ago. I've had it for more than a year and this is the first time it's happened. It hasn't reset with automatic updates and I can't get it to manually update.

instructions from the Casio web site.

Go to the casio web site "casio.com".

Select "support" and the "manuals",
watches;

Accept terms

Select "watch manual archive"

Read the number of the back of your watch and enter it into the search box

5 months , buy the original battery

go to www.casio.co.uk go to support(methinks??) click on watches and put in the model number (the one you posted) and download the PDF manual relating to your watch (you will need adobe reader free download to read PDFs), this will be the full manual, once you figure it out DST will have to be on, as its summertime of course. ( i bought a wave ceptor for a fiver because the guy who had it didnt know how to recalibrate it after a battery change), a quick gander at the online manual put it right, there shouldnt be a problem setting it up again, good luck

For Casio Waveceptor:

--- A
( ) Button Reference
--- B

Set in correct order:
1) Hand Home Position
2) Digital Time Set

1) Hand Home Position:
Press and hold A and B for 5 seconds, Press A to move Second Hand to 12: position: (if not there). Press B to enter Hour/Min set mode. Press A to move both hands to 12: position. Hold A to move hands fast, Press A again to stop hands. All 3 hands are now at 12' oclock.

Press B to exit Hand Home Position mode and enter Timekeeping Mode.

2) Digital Time Set: (hands will self set when done)
Press and hold B for 5 seconds to enter setting mode.
Press A to advance current item or scroll through choices. Press B to set item and advance to next item.

<Order of Items to Set>
GMT Differential -> Daylight Savings auto/on/off -> Seconds -> Hour -> Minutes -> Year -> Month -> Day -> Day of week language -> Auto receive -> (back to Timekeeping Mode).

<Setting each Item>
GMT Differential: Press A untill your time zone is reached (E=eastern, C=central, M=mountain, P=pacific). Press B to set (advances to next item).

Daylight Savings: Press A untill desired DST mode is reached: ("At" auto, "On" after spring change, "Of" after fall change) Press B to set (advances to next item).

Repeat to set: Seconds (resets to :00), Hour, Minutes, Year, Month, Day, Day of Week Language, and Auto Receive (on/off).
For each item, Press A to advance, and B to set.

Pressing B to set last item exits Setting Mode and enters Timekeeping Mode. Hands advance to current time.

Good luck,
Techjoel

Try this link and type in your module number found on your watch and you should be able to download your watch's manual.
http://world.casio.com/wat/download/en/manual/