This stained glass window honors the return of the swallows to San Juan Capistrano on March 19, of each year. It is St. Joseph's Day. On the following Saturday, immediately following their return, there is a parade in town. The famous birds' return to Capistrano indicates the coming of spring -- a time of renewal and rebirth.
The swallows migrate annually to Goya, Argentina in October and return to their spring and summer home in San Juan Capistrano each March. The swallows' celebration began centuries ago when mission padres observed that the birds' return roughly coincided with St. Joseph's Day on the church calendar, March 19.