Adobe Acrobat Pro can't handle time zones?

Question

I normally work in Texas, but at the moment I am in San Francisco. I have updated the time zone on my Mac OS X 10.6.4 system accordingly. When I attempt to certify a PDF using Acrobat Pro 9.3.3, my digital signature (that I just created on the PDF) is considered invalid by Adobe Acrobat because it "appears to be in the future."
As best as I can explain it, here's what appears to be happening:
My computer is set to Pacific Time Zone. It's 11:44 AM PDT
I digitally certify a PDF.
The Signature Properties say the date of signature is 2010/07/28 13:44:36 -05'00'.
The timestamp included with the signature is dated 2010/07/28 13:44:36 -05'00'
For some reason, Acrobat Pro thinks that the signature is invalid because it appears to be in the future. Why
isn't Acrobat Pro smart enough to handle time zones?
I'm uncertain as to how this error could be occurring. I am using a timestamp server (http://tsa.starfieldtech.com) to timestamp my digital signature. There doesn't appear to be any preference in Acrobat for time zone support, so it must be determining the local time from the system clock, but without the context of timezone.

Answer 1

Hi Sasha,
Was Acrobat running when you reset the system time? If so the original system time (in reality the GMT offset) was loaded into memory at launch and didn't get reset when you modified the System Preference. Acrobat should be able to pick up the new GMT offset, see you are at -7:00 (PDT) and make the changes accordingly.
As you might have noticed, when it comes to digital signatures, all of the times are in "Generalized Time Format". A lot of people mistake this for "European Time" because the month doesn't come first, but this is an ISO standard where the time starts with the year.
Steve