Is the perpetual calendar online accurate?

The online perpetual calendar should be accurate. The zodiac is calculated according to 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 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 after beginning of spring next month. Therefore, it is still a rabbit after the Spring Festival this year until the twelfth day of the first month.