I have an older casio pathfinder tough solar that I'm trying to adjust the tidal info on. I have just moved to Malibu CA. from Florida. Can you help?

You can download manual from Casio's web page. I give you couple links.

MTG900DA 8V Shock Shock Mens Tough Water Resistant Analog Digital Watches...

In depth Review of Casio MTG 900 Shock Waveceptor Tough Solar Watch

Today my 6-year old Waveceptor has adjusted itself to daylight Savings time without my intervention. I was agreeably surprised. For all the years I have had the watch, I kept the module manual by my side just for the two times a year I have to adjust the time.
All this to tell you that you imperatively have to read the module's manual. If you do not have it visit the Casio Worldwide web site and download it. You need the module number. You will find it on the back of the watch. It is a 4-digit number inside a rectangle.

You can get 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

so here is the fix if you get op en display on your casio pathfinder or whatever model. mine happens to be a paw 1200t
1. you gotta break it open 2 pins each side band comes off.
2. pry off the side pieces. this exposes 4 screws.
3. the base then comes off be careful of the gasket.
4. once inside. notice a round circular object on the base and a small oval shiny gold copper piece.
5. For whatever reason the shiny copper piece has shifted and does not make contact with the tiny little springs there are 2 if you shift the base to make contact with the gold piece the op en goes away and watch is back to normal.
6. the fix is move this little piece back to where it belongs. i got lucky and the glue still held when i firmly moved it to its original location. super glue came to mind if it wont stay where it belongs.

7. gasket orientation and cleaning out the gasket channel is a given i used welding tip cleaners to do the intricate work. under the bands are very grungy. mine is about 5-6 years old. reassemble the way it came out.

if your battery is good and you get this op en look to your display for whatever reason this worked for me and if casio uses this as a warranty or warning of water coming in your watch it was a STUPID DUMB IDEA. those springs should be solid state and the watch is useless until it is fixed no light, no baro, no alt, no comp. notta and no buttons work. there is no reason whatsoever that this shiny copper thing shifts but it happened to me and my watch is working and my battery has had H or full power since day one.

If you haven't got instructions on how to do this, you can get
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

By finding a spring loaded rod in the clasp (that is in the set of three holes in the clasp) moving it to the last position. However it was still loose, so by finding the spring loaded rods that hold the links of the band together, pushing them down in the direction of the arrows and removing enough links to fit.

Copy the manual from;

http://ftp.casio.co.jp/pub/world_manual/wat/en/qw2688.pdf

Because it is not a documented problem for this watch in the user manual to be found at http://ftp.casio.co.jp/pub/world_manual/wat/en/qw2767.pdf

Are you sure you acctually have a Casio Protrek Tough Solar Ana-Digi PRG-60T unit or do you perhaps have some other model of Casio watch and have posted in the wrong place on the forum?

A Benrus advance is not a Casio PRG-60T Tough Solar Protrek watch. You posted your query in the wrong place.

If you look at the GMT differential in the manual, you'll notice that it corresponds to the offset from GMT that your time zone resides in. I live in San Antonio but i don't see that on the list. I do know that when we're not in Daylight savings time, I'm -6.0 from GMT... so that's what i set it for. Also, if you're near enough to the coast to use this feature, it would probably be a good idea to compare the watch reading to the actual tides and adjust accordingly.

Hope this helps.