The Vietnamese new year, Tết Nguyên Đán in Vietnamese often falls on the same day in the Chinese calendar, however, they may differ from each other by one day due to the difference in the longitude between the two countries.
ベトナムの新年、節元旦（TếtNguyênĐán）は中国暦と同じになることが多いが、経度の差から1ヶ日の違いがあることもある。