Changes have been made in Git (master):

commit 65b46cf8f1fef3ea006f6bde35c73cd244e3c386
Author: Jan Schneider <jan@horde.org>
Date:   Sat Nov 12 01:40:52 2011 +0100

     Allow to set individual timezones for each event (Request #10727).

     Todos:
     - Implement in traditional view.
     - Dynamically show and hide timezone field depending on the selected
       driver's capabilities.
     - Think about recurrence exceptions.

  kronolith/docs/CHANGES             |    1 +
  kronolith/js/kronolith.js          |    1 +
  kronolith/lib/Ajax/Application.php |    5 +++
  kronolith/lib/Driver.php           |   10 ++++++
  kronolith/lib/Driver/Sql.php       |   16 +++++++--
  kronolith/lib/Event.php            |   46 +++++++++++++++++++++++---
  kronolith/lib/Event/Sql.php        |    5 +++
  kronolith/lib/Kronolith.php        |   62 +++++++++++++++++++++++++++++++----
  kronolith/package.xml              |    2 +-
  kronolith/templates/index/edit.inc |    8 +++++
  10 files changed, 140 insertions(+), 16 deletions(-)

http://git.horde.org/horde-git/-/commit/65b46cf8f1fef3ea006f6bde35c73cd244e3c386

There are times I want to schedule an event in a timezone other than 
my home.  Examples are when traveling to an event in another city or 
when scheduling a recurring event based on the time in another 
location.  The second use case is especially important because of 
daylight savings time changes.  For example, a coworker of mine who 
lives in the UK wanted to schedule a recurring meeting at 10AM EST.   
He scheduled it in his local time based on the offset at the time 
(which was only 4 hours) but then the events were wrong when the DST 
change occurred.  It would have been easier if he could have scheduled 
the event itself to be in my timezone.