Samoa moved west of the International Date Line in 2011 and skipped December 30 during the change.
At the end of December 29, 2011, Samoa advanced its clocks by 24 hours, moving directly to December 31. The government made the change to align Samoa's working week more closely with major trading partners such as Australia and New Zealand, which were located on the opposite side of the date line under the previous arrangement.
The shift reversed Samoa's earlier position relative to the calendar. Before 2011, Samoa had been east of the date line and was among the last places to begin a new day. After the change, it became one of the first countries to enter each new date, although its precise position in the global sequence depends on other time zones and daylight-saving rules.
American Samoa, a separate territory, did not make the same change and remained on the other side of the date line. The two Samoas therefore became separated by a calendar day despite their geographic proximity.