Think not only of time zones when phoning abroad, but also the International Dateline.

打国际长途时除了要考虑时差，还要考虑国际日期变更线。

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Samoa said it wanted to move its clocks 24 hours forward, in effect changing the Pacific's already zigzagging international dateline.

萨摩亚群岛表示将把时钟向前调24小时，实际是变动了太平洋地区已经非常混乱的国际换日线。

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Emergency officials will be watching closely as countries along the International Dateline bring in the New Year.

CNN: graphic

Samoa and Tokelau have skipped a day - and jumped westwards across the international dateline - to align with trade partners.

BBC: Samoa and Tokelau skip a day for dateline change

But it will be the first in the world to cross over into 2012, according to its government, now that it has joined Samoa in shifting to the other side of the international dateline.

FORBES: South Pacific 2012: Samoa and Tokelau Jump To New Year's Eve Early