No idea. That makes no sense to me.

Guess this is why I always stick to Citizen's when it comes to radio controlled watches.....

Good luck. Hope you get the correct answer here sooner than later.

 

Hi, journeyforce-- I have a Junghans Mega Futura which also requires to be manually reset at the changeover between standard and daylight times, and I've always thought Junghans to be a leader in radio-synched watches. I'm in Portland, Oregon, USA, and the watch synchs with Fort Collins about 95% of the time. I've always supposed that the need for a manual reset was because of the vagaries surrounding the adoption of DST, both locally and internationally--it seems like I always see public debates and articles this time of year about legislatures considering using DST permanently.
I'm curious to know if your Citizens and G-Shocks can adapt to changes in local laws regarding time. (I notice my little Tracfone/Alcatel flip phone is still an hour off, though that's a completely different system I know.)

Best wishes, ReggieH

 

hmmmmmm.........you got Seiko'ed!!!
another customer!

 

Strange. The blurb below is from the Ft Collins WWVB web page. I'm guessing that the SBTM299 doesn't read the DST flag from the signal.

In the first of the two formats, based on PWM, which has been in use for several decades, the carrier power is reduced by 17 dB at the start of each second and restored to full power 0.2 s later for a binary "0", 0.5 s later for a binary "1", or 0.8 s later to convey a position marker. The pulse-width modulated time code contains the year, day of year, hour, minute, UT1 time correction and flags that indicate the status of Daylight Saving Time, leap years, and leap seconds, as listed in the legacy WWVB time code format description and detailed in NIST Special Publication 432 (NIST Time and Frequency Services).​

 

I remember the older 8B series atomic solar watches required the owner to change the time zone in order to cover DST but I thought that a newer movement (the 7B75 came out in late 2020) would have added a DST as Citizen and Casio have both analog and digital atomic solar watches and all of them get DST automatically. I also have a few Seiko digital atomic/solar watches and they also automatically get DST. So it appears Seiko is ether cheap or incompetent when it comes to designing a analog radio control watch that automatically gets DST

Then there is the fact that they have a few 7Bxx models that do get automatic DST. BUT only for the German time zone. So if you live in an area of Europe that has the same time zone as Germany and gets summer time then it will work for you. But not if you are in another time zone

 

I know this is the wrong spot for it, but when I changed my snowflake this morning, I discovered I was +14 seconds since the last time change. Sure it was a hassle, but it feels like that's a pretty accurate hassle.

 

If a watch can’t handle DST automatically doesn’t it sorta remove some of the advantages of having an atomic watch?

 

Exactly. They should have just made this watch solar and perpetual so you did not have to touch the calendar and dumped the radio part.

 

Well it seems like your gov just passed a bill for permanent DST starting next year lol!

 

Only one chamber, the bill still has to pass the House and then be signed into law by the President


Sent from my iPad using Tapatalk

 

I feel apprehensive about turning my watch backwards too, but I think it is mostly ok with these. I feel like the only reason to do it would be to Fall back for DST though. It is only an hour and i think it is ok if you are gentle. But I would run it back just a little then wind it forward to actually set it. Also with Seikos that have the day/date complication I would only do it between 4AM and 9PM. This prevents damaging the complication.

<sorry, wrong post>

 

Astron do it automatically.

 

Yeah, I noticed the same on mine (SBTM323, 7B72 movement). There’s no DST on/off/auto. Pulling the crown makes the seconds hand spin to indicate offset from GMT (e.g. 54 seconds means GMT -6). When DST changes, the local time offset changes too. Not a huge deal for me; changing the hour doesn’t interrupt the timekeeping.