The Romans called the fourth month Aprilis which is how it became April under the Gregorian calendar. April (in the northern hemisphere)is the transition from winter to spring and farmers are generally busy during this month. In olden times, specific festivals to deities were often performed but fell out of use as people become more urbanized and Christianity replaced many pagan beliefs.
Passover and Easter are often celebrated in April. The diamond is the birthstone for April, while the flower is either the daisy or sweet pea.