According to the eight-character naming principle, babies born on New Year’s Eve in 2021 have special numerology. Since New Year's Eve is the turn of the lunar year, your baby's numerology will be affected by both the previous year and the following year.
First of all, 2020 is the Year of the Rat, and 2021 is the Year of the Ox. For babies born at this time, their zodiac signs may be mixed. For example, a baby born on New Year's Eve may have a Gengzi or Xin Chou Heavenly Stem, plus the subsequent Earthly Branches of the Year of the Ox. Therefore, the combination of the heavenly stems and earthly branches will affect the baby's personality, destiny, etc.
Secondly, for naming, you can choose according to the baby's horoscope characteristics and family preferences. For example, if your baby's horoscope is biased toward wood or fire, you can choose characters related to these two elements as a name. In addition, the melody and good and bad connotations of the name should also be considered.
Please note that the above is for reference only, and selection needs to be based on the baby's specific situation and family preferences.