What constellation is April 12?

Aries.

According to Baidu Encyclopedia, Aries is one of the zodiac signs, and its birth date is between March 2 1 and April 20/in the solar calendar. April 12 is in this range, so it is Aries.

Aries, one of the twelve constellations, covers an area of 44 1 square, accounting for 1. 1% of the total area. Among the 88 constellations in the whole day, Aries ranks 39th in area. Aries is a dim constellation. Only two bright stars are brighter than Category 3, and only four bright stars are brighter than Category 4. The brightest star is Loususan (Aries α).