Dear Maintainer,

   * What led up to the situation?
I recieved a calendar event in the Moscow timezone, and spent 30 minutes waiting
for others to join. The timezone data is an hour out: https://bugzilla.mozilla.org/show_bug.cgi?id=1009894

This is a known issue with the way lightning tracks timezones - it ships its
own copy of the tzdata information, which needs to be updated regularly. Sadly,
it appears Jessie's iceowl-extension now contains out of date information and
most of Russia is now in the wrong timezone, so calendar events are an hour out.

There is an extension workaround provided at the bottom of upstream bug
https://bugzilla.mozilla.org/show_bug.cgi?id=1009894:
"calendar-timezones-1.2015a.xpi"

Installing this into Icedove on Jessie does resolve the issue, but you
have to disable cached events and refresh the calendar for the changes
to show up. You can re-enable caching once the events have refreshed.

I hope this helps someone who's confused about what's happening with
Jessie's icedove/iceowl extension.

clone 800592 -1
retitle -1 Must not ship it's own timezone information
severity -1 normal
thanks

Hi,

The main issue here is that the extension is not able to use system
timezones. So let's creat a separate issue for this so it's not
forgotten. Looking at the format used to create the sqlite database
fixing this does not look impossible. See

https://bugzilla.mozilla.org/show_bug.cgi?id=1129963

Cheers,
 -- Guido