Addendum: Since the #ChineseCalendar depends on the exact positions of the sun and moon, traditional New Year celebrations in #Vietnam and #Korea can happen a day earlier than in #China. They use the same calendar, but are in a different time zone; as such, the month might start a day earlier if the #NewMoon happens to fall very close to #midnight.
#Japan would celebrate New Year's Day on the same day as Kore had the government not abandoned the traditional celebrations in the #MeijiRestoration