system
A chat on subreddit /r/NoStupidQuestions
human
Because it's not just Chinese.  A lot of different cultures also consider this to be the first day of the new year.
gpt
For example, I’m Korean and I celebrated the new year today! (It’s a huge holiday in Korea.) There’s been a big push to call it the Lunar New Year (I want to say over the last five years or so?) because a lot of Asian cultures celebrate it and it’s not just a “Chinese” new year. The term makes it more inclusive :)