The most common mistake is using the Gregorian year alone. That works for many birthdays later in the year, but it fails around the New Year boundary. The table below separates the calendar parts so the year answer stays readable and precise.
The Gregorian year is only the modern date index. It helps a reader find the right row directly, but the zodiac boundary in ordinary New Year culture comes from the lunar-year change. A person born after Lunar New Year normally belongs to the new animal year; a person born before it is still read with the previous animal year.
The full traditional year name adds more detail. One Heavenly Stem and one Earthly Branch combine into the stem-branch name: the branch gives the animal, while the stem gives the Five Element tone. That is why a years table has to show more than a single animal label when it identifies the traditional year accurately.
Once the year is placed correctly, the next distinction becomes clearer. The animal entry explains cultural meaning; the single-year entry explains element and boundary context; BaZi adds month, day, and hour; daily timing brings the birth-year reference into a present-day reading.
