I don't see how GPS will help with the DST issue. GPS will only tell you the Coordinated Universal Time (UTC) with some obscene precision, and your current location. There is no notion of daylight savings time. The Navigation System Manual says that it uses location info to figure out what time zone you were in. The "system clock" on the Prime (the one set on the big screen, not the one set on the little MID, which is the one used by the charge timer), at least in my Advanced, has several settings: (1) time zone (2) "Auto adjust by GPS", and (3) daylight savings time. When I looked at this screen, it had "Auto adjust by GPS" and "DST" both turned "ON". Between the three of these, one can compute the local time: GPS gives UTC, time zone gives the offset from UTC, and DST adds one hour. But this morning, the clock still was showing DST. Then I twisted my mind around, and realized that the "DST" button is meant to say whether the DST is in effect, not that DST is used in this area, and some formula (dependent on governmental whim) should be used to determine if it is currently in effect. So I had to turn the DST button to OFF, and the "system clock" showed the right time. Of course, the car was still in the garage when I looked at it, and it is possible that the system clock would have recomputed itself once it got a GPS signal.
That's true, which is why the watch does it at midnight when it's more likely that inversions will reflect the signal down. I've never missed a signal anywhere I've been in the continental US. I live about 60 miles from the transmitter, but I've received it no problem in Oregon, Washington DC, and Florida.
I have the same issue as Port Latour. Read the manuals and can't change the system time. Clock time on the MID was easy. What gives? I have the GPS enabled for changing times when crossing zones.
On the large screen, the path to the system time is the physical "Menu" button, then "Settings", "General", "System Time". I assume that one is not given the option to enter the time if you have "Auto adjust by GPS" on.
I know our NTP servers at work (NTP has DST) get their time references from GPS. In the past people have seen their GPS time automatically update. Perhaps the GPS receiver has the time change information. I have a non-atomic clock that does that. It does not sync with a time source but you set time zone information and it changes as needed.
Going through everyone's response, I'm convinced that there is no reason why Toyota could not have synchronize the clocks in the Prius Prime. I manually changed the clock yesterday and wasted only a couple of minutes of my time. I guess it's a minor inconvenience that's not worth addressing.
As mentioned in this thread, there are many ways than just GPS. Even then, NAV is not standard on all Honda trims, but my trim with the navigation is able to automatically update the time. Not to sound like a Honda fanboy (I've owned Hondas all my life), but what friends are saying about the entune system is true. There is a lot to desire and Toyota should have made bigger improvements since we are limited to only Entune, whereas many other car manufacturers are adopting car play/ android auto.
A previous reply was correct. To change the nav system clock, put car in ready mode (turn on without foot on brake), push menu, general, settings and system time. The DST must be turned off. GPS switch doesn't matter.
Long ago, in a previous century, when I was on HP*UX systems and configuring some local NTP (Network Time Protocol) setups, the DST changeover was built into the local systems, and was user configurable. The network and machine times remained in UTC, which lacks DST. One local developer also had a GPS time receiver, but we didn't link that as a site reference during my time there. The facility also had a high quality 10MHz frequency standard, piped around to the manufacturing test stations. It predated GPS and inter-site computer networks, instead linked to WWV by the old geezer HAM radio aficionados. And it was stable enough to very clearly show the changing altitude of the reflecting ionosphere through the night and morning hours, substantially changing the path length from WWV.
I vote for Daylight Savings Time all year 'round. Here in SoCal by the coast, it gets dark around 4:30pm at times during the year (yuck), and for those who don't have to wake up super-early, the now-bright light in the early morning wakes one up. DST all year long! PS: my plug-in "auto-set" alarm clock sets correctly each time change. My battery-operated "auto-set" wall clock never has once.
In the northeast DST would be nice all year...Dark at 4:30pm is just wrong. Without DST, I would recommend the northeast move to Atlantic time.
What? 8 a.m. is super early? Up here under standard time, sunset will happen at 4 pm. But if we use DST to push that back to 5 pm, then sunrise won't happen until 9 a.m. It is just a fact of life that up here, that at the winter solstice, total daylight is shorter than the standard work&commute day. We simply cannot have daylight at both ends. Unless we move a long way south. I oppose year-round DST on the grounds that a 9 a.m. sunrise is just wrong.
The reason I wish we had four time changes instead of two is because I find my health is far better when the sun is waking me up at the right time. Unfortunately, our tilted planet results in sunrise being a variable compared with our clocks. Without DST, the sun is waking me up way too early at the beginning of summer. In the dead of winter (and right before DST ended yesterday), I'm waking up in the dark, and it's dark when I'm driving to work. Ideally for me, sunrise would be around 6:00 or so every day of the year.
Casio G-Shock watches are available with 6 bands so they can listen worldwide. I have a few of them. Posted via the PriusChat mobile app.
You could move to a city near the equator. I remember being in Singapore and Jakarta throughout the year and sunrise and sunset was almost always at 6am and 6pm. It was strange in the summer with the sun down at 6pm.
