Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: Cell phone time, etc
    From: Frank Reed
    Date: 2005 Apr 16, 01:50 EDT

    Dan Allen wrote:
    "Cell phones are the first  common technology which automatically change
    time zones."
    And they  usually get these things right. Of course you have to be passed off
    to a cell in  the new time zone before it takes effect.
    And added:
    "I have always  wondered why Garmin and others did not put a
    little more effort into  displaying the right local time automatically:
    a GPS knows where you are, add  a map of the time zone boundaries and
    you can do it automatically, but nobody  does!"
    Well, at least part of the problem is that the laws are local and  they
    change. When did the standard rule for DST change in the US, by the way? It  was
    different 25 years ago, I think. Of course most PC operating systems do it
    automatically, but they're perhaps easier to keep  up-to-date.
    "However I have noticed that my Motorola cell phone  does not
    automatically change times for Daylight Savings Time.  You must  turn
    the phone off and then back on again, and when it wakes up it then  gets
    the right time post-time zone change."
    Interesting. Two weeks ago  Saturday night when we switched over to DST, I
    was out with a few friends. One  had a cell phone that jumped ahead at 1am --an
    hour early-- then went back to  Standard Time about 15 minutes later (I don't
    remember which service provider).  At 4am his phone still displayed Standard
    Time. Two of us, on different  services, saw the switchover on our phones
    within a minute of the correct time  when 2am became 3am. And a fourth saw no
    change until late the following  evening. In your case, I wonder if you would get
    the DST update by travelling as  well as by powering down... That is, do you
    get time zone changes as you drive  along a highway? Or have you only had the
    experience of checking the time zone  after a power-down (presumably when flying
    cross-country)? If you do get time  zone updates while moving from cell to
    cell without powering down, then it seems  likely you would Savings
    Time/Standard Time updates similarly. So now you have a  project for 2am on the first
    Sunday in October six months from now!  

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site