I don't think it's quite been finalized yet, but http://www.bbc.co.uk/news/world-13334229 seems to suggest that (Western) Samoa will transition from Thursday 29 December 2011 23:59:59 UTC-11:00 to Saturday 31 December 2011 00:00:00 UTC+13:00.

So Samoa plans to reset its clocks and calendars when it shifts the dateline - probably on Thursday 29 December, Prime Minister Tuilaepa Sailele Malielegaoi said.

Samoa will lose a day as it jumps straight from Thursday to Saturday. Any residents with a birthday on Friday 30 December will have to celebrate a day early, or a day late, as that date will not exist in their country.

http://www.samoaobserver.ws/index.php?option=com_content&view=article&id=33094:moving-to-&catid=64:sunday-reading&Itemid=82 also mentions that "the shift would probably take place on December 29."

--
Tim Parenti



On Tue, May 10, 2011 at 17:19, Olson, Arthur David (NIH/NCI) [E] <olsona@dc37a.nci.nih.gov> wrote:
Does anyone know at what instant Samoa plans to make its 24-hour jump?

                               --ado