1.
New Year's greeting; Happy New Year
A formal expression used on New Year's cards and decorations to celebrate the new year. Literally means 'celebrating the new year.' Primarily a written greeting.
A New Year's decoration saying 'Happy New Year' was displayed at the company entrance.
Usage
賀正 is a two-character New Year's greeting commonly printed on 年賀状 (New Year's cards) and seasonal decorations. It is considered a somewhat casual abbreviated form.
Important: Two-character greetings like 賀正 are traditionally seen as abbreviated and therefore less formal. When writing to superiors or elders, four-character greetings such as 謹賀新年 are preferred.