Samoa skipped December 30 in 2011 when it moved across the International Date Line.
At the end of December 29, 2011, Samoa advanced its clocks by 24 hours. The next local date was December 31, so December 30 did not occur in Samoa's civil calendar that year. The change moved Samoa from the American side of the date line to the Asian and Australian side.
The government said the shift better matched Samoa's major trading partners and nearby Pacific countries. Before the change, Samoa was one of the last places to enter a new day; afterward, it became one of the first.
This event is sometimes confused with Samoa's separate daylight-saving changes. Skipping a calendar date resulted from crossing the International Date Line, not from moving clocks forward by a seasonal hour.