The first new moon of the lunar calendar officially ushered in the new year in many cultures Wednesday, marking the imminent arrival of spring and the first day of the Year of the Snake, which symbolizes good luck, rebirth and regality.

This year, Lunar New Year begins today, Wednesday, Jan. 29, and ends Feb. 12. Lunar New Year, also widely regarded as Chinese New Year since the late 19th century when it gained global recognition through Chinese immigrant communities, is a centuries-old tradition rooted in the lunar calendar.

Across the world, hundreds of millions of people are welcoming the Year of the Snake as they celebrate the Lunar New Year with fireworks, family time and festive dances. In north and Southeast Asia, from China to Indonesia,

Lunar New Year — also commonly called Chinese New Year — marks the start of the new year based on lunar calendars, or monthly cycles of the moon's phases.   The lunar new year starts with the first new moon of the lunar calendar and ends on the first full moon,

Over 1 billion people celebrate the holiday, which marks the transition from cold winter to a season of renewal and ushers in one of 12 Chinese zodiac signs.

From public parades to traditional dances, here's how countries around the world are celebrating the Year of the Snake.

Many Chinese who work in bigger cities return home during the eight-day national holiday in what is described as the world's biggest annual movement of humanity.