For the time setting, you set the time format as 12h or 24h, the daylight saving option is a manual one since the car does not know what the date is even with the columbus headunit. Switching the daylight saving on/off moves the clock 1hr in each direction depending on what option you had selected first. When the clocks change, simply set this option to the other setting and the time changes accordingly.

The Columbus headunit uses the date so it understands the celestial data it gets from the satelites, this is why it takes a while to get a satelite lock if the date is set incorrectly on the Columbus.

Time:- If the Columbus has access to a radio clock, it will change to Summertime automatically.

I must admit I am still confused by the "time" & the "date" with regards to the Columbusn Sat Nav: Columbus must know the time (very, very) accurately otherwise it would not work. If it does have its own clock, then it is kept in time by the GPSs' atomic clock (which is even adjusted for Einstein's law - e=mc2). On my wife's Peugeot 807 the hours you set for which ever time zone you are in and the minutes are slaved to the GPS - When the pips go, it is always spot on.

As to the date, I don't think the GPS needs it. The GPS satelltes know where they are and all your GPS Receiver does is calulates the time difference between them to calculate its own postion.

So the question is - why do you have to enter the date (and you can choose the format -day/month; month/day) and then not be able to see it anywhere? At my time of life, knowing the day and date is a help to the start of the day! Does the time you set up in the MFD get up dated by the GPS? I'm guessing that it does not have access to the "radio clock". I have not had mine long enough to notice whether the clock time varies by a few seconds or not...

I'm pretty sure that my Columbus unit didn't update the time when the hour changed. I left it for a day or so waiting for it to do it itself but gave up and changed in maxidot. The Columbus time then instantly changed to match. Or did I do something wrong?

I'm driving an Octavia loan car at the moment whilst the Yeti has its various faults sorted, and I noted that its Amundsen head unit was still showing BST. In Maxidot, it has a tick box for you to select "Daylight Saving Time", which was ticked. I un-ticked it and lo & behold: the correct time shows on the Amundsen unit as well as Maxidot. (I like the speed limit indication on the Amundsen screen; Columbus - or at least my version - doesn't have that)

Upon return from warranty work at the dealer's yesterday, Columbus time was 12 hrs out, so.... into Maxidot, corrected the time & un-ticked Daylight Saving - again. All back to normal now.

It looks as though when the battery has been disconnected, it reverts to Daylight Saving time (and the mechanic just got his AM's & PM's mixed up).

Most certainly , my Columbus does not auto adjust the clock!

Edited 26 January, 201313 yr by speedsport