What constellation is April 30th?

The constellation should be checked according to the date of birth in Gregorian calendar. You didn't say whether this date is solar or lunar. If it is Gregorian calendar, it is Taurus. If it is the lunar calendar, it is hard to say. If you are interested in horoscopes at ordinary times, you can download a life calendar, which can not only check the horoscopes, but also watch the daily horoscopes for free.