New Year’s Day marks the first day, the first month, the beginning of the year, and the start of spring. A person who celebrates this day will accumulate virtue and be loved by all, just as the moon becomes full gradually, moving from west to east, and as the sun shines more brightly, traveling from east to west.

From “New Year’s Gosho,” The Writings of Nichiren Daishonin, vol. 1, p. 1137