In Japan, the first dream of the year (Hatsuyume) is deemed to reveal something about the year to follow. A common greeting in Japan around that time of the year, but especially on January 2nd, is “What was your first dream of the year?” (Donna hatsuyume o mita?)
The first dream of the year;
I kept it a secret,
And smiled to myself.
Shō-u (Tr. R.H. Blyth)
Since people stayed up all night on December 31, the first dream of the year was actually the one occurring on the night of January 1st. That’s why January 2nd is known as Hatsuyume (day of The First Dream of the Year) in Japan.
It was particularly lucky if you dreamed about Mount Fuji, a hawk, or an eggplant.
I hope you had a good dream. Best wishes for the New Year!
Old Pond Comics 
Btw, in Japan they would have celebrated the start of the new year at the same time as the Chinese calendar until they switched to Jan 1 in the late 1800s. I wonder how far back the “first dream” tradition goes.