I just experienced this problem (on iMac Intel) yesterday, April 4. (April 4 was the old daylight savings date before the change a few years back.) The computer was on all night, worked fine Sunday morning from 4 a.m. to 7 a.m., but when I started it up Sunday afternoon I got warnings from several processes, including clock and wireless.
I tried restoring from several Time Machine backups, one from Sunday at 6:30 a.m. and the other from Saturday at 10:30 p.m., but the problem continued regardless.
The only solution was to manually set the system time and re-enter my wireless password.
So, it did happen after DST. (Unless you count that Apr 4 was the old DST date.)
This same thing just happend to me as well. My battery still had a little charge when I shut it down last night and this morning I get this time/wifi issue.
All the same issues here. "Resolved" by first setting the clock manually, then restarting, then back to automatic time setting again.
One observation: the problems appeared after a "cold" startup, which took longer than normal and the display stayed dim until all the startup routines had finished.
Joining the club because it seems this is still unresolved and has been happening at random for months....first warning said that my clock had a date prior than 2008 (turned out to have been set back to 2000)....then I got firewall warnings for what turned out to be legitimate system processes....lost WiFi password.....then wouldn't connect to the Internet even after entering password.....set clock manually and rebooted, seems to have fixed itself now, but an explanation for this bizarre event would be appreciated.....
I started having this problem a few days ago. I just installed the latest security update via automatic updates (Security Update 2010-003) and after a few reboots, it seems to be behaving. It is remembering my wireless networks and the time is not being changed to Dec 31 2008, nor am I getting any firewall warnings.
Oddly this happened to me this day, rebooted my late 2009 21.5" iMac and it had lost time and date and wifi, I reset time manually rebooted and had a few firewall messages about excepting incoming connections which I had to say yes to, rebooted again set time to auto and ran permissions and verified disc, no issues, reset SMC just in case and so far all seems well, very odd though.
This has just happened to me too. Once a month I drain my MB's (unibody) battery down for calibration. Usually after doing this, the MacBook returns to the state it was in when the battery ran out. However, this time it seemed to shutdown the machine completely. I started back up and had to login, to which I found that the wireless network had been forgotten and clock had been set back to before Jan 1st 2008.
same thing as others are describing-- clock reset, lost wireless, and reboot after unchecking auto-time update worked. only things out of the ordinary were a PCL error printing the bootcamp docs out last night, actually running bootcamp assistant, and a stupid Adobe Acrobat auto update that's been trying to run consistently.
Adding my name to the list, happened this morning. Shut down ok last night, though I did notice the graphics struggled with switching tabs between Picnik and anything else.
I turned it of for an hour, disconnected the charger becasue I was planning on going out with it. When I reconnected the power cable to start it I the date got reset to dec 31 , 2000. My battery was fully charged when I had it disconnected
This just happened to me today as well. It was working fine this morning before work. I powered it up tonight and I got a warning about the time/date being reset and all passwords associated with my network and mail settings were gone.
The SMC reset appears to have fixed it but I have not restarted it since doing it to see how it boots back up.
Thought I'd myself to this growing list as well. My Macbook Pro (late 2009 version) had a full battery. I hadn't had it on for two days due to travel. When I turned it on this morning the clock was reset to Jan 1, 2000, the wireless network password was forgotten, and all the passwords for my Mail accounts had been forgotten. I also had several firewall "deny/allow" messages come up. This is really weird. I wish we had more information from Apple on this.
Adding myself to the list and wondering if adding a scheduled SuperDuper backup could cause the issue. That's the only major system changes I have recently made. Macbook late 2008 unibody.
