Happy New Year!" Happy New Year" is the correct way. (正解!) "Years" is the plural form of "year" as in "many years". If you have heard "Happy New Years", it's either a misspelling or it could be interpreted as "year's" as in "Happy New Year's (Day) or Happy New Year's (Eve).|Happy new year is correct.

Understanding the Context

We do not say Happy New Years!的同义词 AOL: 30 Free Printable Valentine's Day Coloring Pages for Kids and Adults