There are several fixed phrases, but it's customary not to use two-letter words such as 賀正 and 迎春 to elders and people who have helped, except for colleagues and friends of nearly the same age.
幾つかの決まり文句があるが一般的に同僚や同年輩以外の年長者や世話になった相手には賀正、迎春などの2文字熟語は避けるのが慣わしである。