Easter is a Christian holiday commemorating the resurrection of Jesus Christ from the dead three days after his crucifixion on Good Friday and marking the end of the Lent.
Passover is a holiday that celebrates the escape of the Israelites from Egypt in approximately 1225 B.C.E. The narrative of this adventure is told in the Biblical book of Exodus.
March 20th, the first day of spring begins the season of flowers, spring fever, outdoor celebrations and more. Spring is usually when flowers bloom, animals are hatched or mating begins.