Joseph's Day. Juan loves las golondrinas, and so does his friend, Julian, the gardener at the mission.This year Juan plants a garden in his own yard. There's nothing he wants more than for the swallows to nest there. And on St. Joseph's Day, his dream comes true.Leo Politi is beloved author and illustrator of Pedro, The Angel of Olvera Street, among many other books for children. Song of the Swallows won the Caldecott Medal in 1950.