auto dst did not work on my GW-6900, what gives?

Thread: auto dst did not work on my GW-6900, what gives?

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  1. #1
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    auto dst did not work on my GW-6900, what gives?

    Why didn't the auto dst feature work?

  2. #2
    Member apnk's Avatar
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    Re: auto dst did not work on my GW-6900, what gives?

    Did it sync? On my watch it synced a few minutes ago and the "DST" icon disappeared.
    Rolex Explorer, Tudor Pelagos, Sinn EZM3

  3. #3
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    Re: auto dst did not work on my GW-6900, what gives?

    What's your location?

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    Re: auto dst did not work on my GW-6900, what gives?

    Knoxville, TN, USA

  6. #5
    Member Doctorsti's Avatar
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    Re: auto dst did not work on my GW-6900, what gives?

    The time doesn't change, fall back, until 2AM on the 2nd of November. The DST should still be on today Sunday the 1st.

    Edit: just checked the NIST.gov site and it appears I am wrong. DST does end at 2AM on the 1st. I really thought it wasn't until tomorrow. To the OP, my GW6900 didn't change either.
    I am going to manually sync the watch now in the window and see what happens.
    Last edited by Doctorsti; November 1st, 2009 at 08:29. Reason: wrong again, usually I am right

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  7. #6
    Member Doctorsti's Avatar
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    Re: auto dst did not work on my GW-6900, what gives?

    Try re-syncing the watch. Mine just updated and is correct. No more DST, sad now that it will be getting dark at around 5:30PM, booo.

    Rolex 116610LV HULK Submariner
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  8. #7
    Member Micha's Avatar
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    Re: auto dst did not work on my GW-6900, what gives?

    AFAIK only the German and UK signal automatically change the DST setting on your watch. It's DIY on Japanese and US signals AFAIK.
    Cheers,
    Micha

  9. #8
    Member WhtShadow's Avatar
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    Re: auto dst did not work on my GW-6900, what gives?

    The US signal carries the DST information. All of mine did their thing over night, and are correct this AM.
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  10. #9
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    Re: auto dst did not work on my GW-6900, what gives?

    Check if the DST setting of your watch is AUTO, and not ON.

    If it is ON, it will ignore the settings carried by the signal and will just stay with the DST on.

    It needs to be AUTO to set correctly by the signal.

  11. #10
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    Re: auto dst did not work on my GW-6900, what gives?

    Quote Originally Posted by Micha View Post
    AFAIK only the German and UK signal automatically change the DST setting on your watch. It's DIY on Japanese and US signals AFAIK.
    The US signal carries actually two bits, one saying whether DST was in effect in the beginning of the UTC day (at 00:00 UTC that day), and the other bit says whether DST will be in effect in the end of the UTC day (24:00 UTC that day). This is necessary, because in America, the same way as in Russia, each zone changes their DST at different points in time (each zone by its own local time); unlike in Europe, where it happens at the same time in all three time zones.

    See this for detailed info
    http://en.wikipedia.org/wiki/WWVB
    and also this thread
    https://forums.watchuseek.com/showthread.php?t=319773
    (first the European DST was discussed but later on the American one as well)

    In Japan they do not use DST at all, but you can see in the specs there are two bits reserved for that in case they may want to use it in the future
    http://en.wikipedia.org/wiki/JJY

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