[tor-bugs] #20981 [Applications/Tor Browser]: The localized date string on Windows reveals local time

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#20981: The localized date string on Windows reveals local time
-------------------------------------------------+-------------------------
 Reporter:  gk                                   |          Owner:
                                                 |  arthuredelstein
     Type:  defect                               |         Status:
                                                 |  accepted
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Major                                |     Resolution:
 Keywords:  tbb-fingerinting, tbb-regression,    |  Actual Points:
  tbb-6.0-issues, TorBrowserTeam201701           |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by cypherpunks):

 http://browserspy.dk/date.php on Linux:

 - the fields get filled only on low and medium-low security.

 - "Time and Date" is UTC, unlike my system's time, but my hardware clock
 is also UTC.

 - "Locale string" is always `date +"%x, %r"` in "en_US" format, unlike my
 system-wide setting.

 - "Difference between server and PC time" is consistent across two
 operating systems on the same machine, with +/-2 second variation. The
 difference was noticeably reduced after running `ntpdate pool.ntp.org` and
 refreshing the page.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20981#comment:7>
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