What is the constellation on April 3rd?

Hello, the constellation is a fortune-telling thing for westerners. Because westerners don't have a lunar calendar, we should first convert the birthday of the lunar calendar into the solar calendar, and then look up the constellation table.

? If it is April 3 in the solar calendar, it is Aries.

? If it's April 3rd of the lunar calendar, because you didn't say the year of birth, you can't accurately convert the month of the solar calendar, so you can't figure out what constellation it is. ?