Timestamps must be based on standard times only and not take into account local variations such as Daylight Savings Time. For example, I am in the Central Standard time zone which, in the winter, is UTC (GMT) minus six hours. Thus, the timestamp on my Acrobat signature will always show a time followed by UTC minus 6:00. This is not my local time right now, but it is the correct time for six hours behind Greenwich time.
In older Mac operating systems, you could have fixed this by telling your computer not to adjust for Daylight time, and then just moving your time zone one to the east for daylight time. I don't think that is possible in current Mac's.However, my timestamps are always correct in terms of UTC (GMT).
The computer time used as part of the signature creation does use the DST offset on Windows. That is, the signing time would be one hour later and the UTC offset one hour less. It's not that we can't use the current time, but as noted above there is something amiss on the Mac. The good news is everything in the digital signature world is based on UTC time (or more specifically "generalized time" with the UTC offset) so the signature will still validate correctly. The bad news is the behavior on the Mac does not match the behavior on Windows and parallel behavior is something we strive for. Thus, this is a bug.
Adobe Systems, Inc.
Agreed. I just meant, as you said, that the time is accurate as a UTC offset, but not the current time where I am. It has been driving me crazy as well but I can't find any way to make the Mac output the same time it is displaying.. It bugs me when I send out a digital signature, but nobody knows where I am anyway, and the time is correct as expressed. It seems to be a Mac problem but maybe the Adobe software could find a way to correct it.
Thank you Steve.Madwin!
The conversations I had with Adobe Technical "Support" (that term seems ill-suited in describing my experience) kept returning to my computer's time/date settings and/or a re-statement of the problem, rather than the possibility that Acrobat X (Mac) was at fault. As previously stated, my computer's time/date settings are accurate (they are syncronized to time servers), the OS software is up-to-date and has all updates applied, and all other software accurately reflects both the correct local time and the correct local time zone. And yet, when signing a document in Acrobat X Pro, things were an hour off. My specific example warrants repeating:
- Sign a document at 9:15 AM local time in San Francisco on April 2, 2012.
- The timestamp appearing to the right of my digital signature reads: 2012.04.02 08:15:20 -08'00'
- It SHOULD read: 2012.04.02 09:15:20 -07'00'
Would you please submit this as a bug report.
Thanks for your help. Your post has given me some hope that SOMEONE at Adobe understands the problem (finally) and confirms that this is an issue that needs to be fixed. Stamping documents (esp. legal ones) with a timestamp that is not accurate is a serious matter.
I can't tell you when you'll see the fix because ship dates are proprietary until the company makes them public, but I can assure that this will be fixed. Actually, it's fixed now, you're just not going to see it until the next upgrade or update is made available. Thanks for pointing this out.