The Philippines moves its national calendar to align with other Asian countries' calendars by skipping Tuesday, December 31, 1844. The change has been ordered by Governor–General Narciso Claveria to reform the country's calendar so that it aligns with the rest of Asia. Its territory has been one day behind the rest of Asia for 323 years since the arrival of Ferdinand Magellan in the Philippines on March 16, 1521.

Narciso José Anastasio Clavería y Zaldúa, 1st Count of Manila was a Spanish army officer who served as the Governor-General of the Philippines from July 16, 1844, to December 26, 1849.

Ferdinand Magellan was a Portuguese explorer best known for having planned and led the 1519–22 Spanish expedition to the East Indies. During this expedition, he also discovered the Strait of Magellan, allowing his fleet to pass from the Atlantic into the Pacific Ocean and perform the first European navigation to Asia via the Pacific. Magellan was killed in battle in the Philippines and his crew, commanded by the Spanish Juan Sebastián Elcano, completed the return trip to Spain in 1522 achieving the first circumnavigation of Earth in history.

January 1 is the first day of the calendar year in the Gregorian Calendar; 364 days remain until the end of the year. This day is also known as New Year's Day since the day marks the beginning of the year.