Is the perpetual calendar online accurate?

The perpetual calendar on the Internet should be accurate. The zodiac is calculated according to the beginning of spring. Genus corresponds to the earthly branches in a year. Such as "mouse" and "ugly cow". The calendar year of the lunar calendar is based on the beginning of spring. You can look at the calendar. For example, this year's Spring Festival is before beginning of spring. On the calendar, many days after the Spring Festival, it is still the year of Xin Mao. It won't be a year until next month's spring. Therefore, it is still a rabbit from the Spring Festival this year to the twelfth day of the first month.