On Thu, Aug 27, 2015 at 11:32:13PM -0700, aparsloe wrote: > [The system date on my computer is correct. I can't see a setting for time > in Thunderbird. But I do live reasonably close to the International Date > Line.] The problem is with the time zone. The date and time are correct in your time zone, but are incorrectly marked as UTC-7, i. e. US Pacific Time, instead of New Zealand time (UTC+12). Your emails thus systematically appear to have been sent 19 hours in the future. Best, Arthur