People in Samoa (population 193,000) want to be closer time-wise to Australia, New Zealand, China and Tonga because they do so much more day-to-day business with those relatively nearby nations than with the rest of the world. And the problem until now, for example, has been that when it's 8 a.m. Monday in Samoa it's 8 a.m. Tuesday in Tonga. Business people in Samoa have kind of been losing a working day when it comes to dealing with their nearest neighbors.
Now the time, literally, has come. When 11:59:59 p.m. strikes Thursday in Samoa, the next tick will take folks there to Saturday.
And no one will be born or die on Dec. 30, 2011, in Samoa. Weird.
If this had happened in any part of the U.S., you can bet we'd skip Monday before messing with a Friday. http://www.npr.org/blogs/thetwo-way/2011/12/28/144385201/there-will-be-no-friday-this-week-in-samoa?ft=1&f=1001 -via reddit
(Image credit: Wikipedia user Plenz)
Despite the official explanation, I suspect that the Doctor is behind this change.