The primary feast day of Saint Joseph is that of 19 March. In 1955, there was instituted, by Pius XII, the feast of Saint Joseph the Worker for the 1st of May. It replaced the Solemnity of St. Joseph, Spouse of the Blessed Virgin Mary and Patron of the Universal Church, which was called, in short, “The Patronage”, which was held on the Third Sunday after Easter, and had an octave day, from 1847, and from 1913 on the Wednesday after the Second Sunday after Easter.* It had been first celebrated in Spain, in the 17th century and then spread, and very early during the long pontificate of Pio Nino, was extended to the whole world.
Joseph, the foster father and guardian of the Redeemer, worked to feed, house and clothe his family. The fruit of his labor gave succour, that is the value of work, and the workman should be so recognised and respected. His work is not meant for another to be enriched, while he and his have nought.
And in the same house, remain, eating and drinking such things as they have: for the labourer† is worthy of his hire. Remove not from house to house. ― Luke x. 7._______________
Nor scrip for your journey, nor two coats, nor shoes, nor a staff; for the workman† is worthy of his meat. ― Matthew x.10.
Some saints are privileged to extend to us their patronage in certain cases, but not in others, with peculiar efficacy; but to our holy Patron, St. Joseph, it is given to assist us in all cases, in every necessity, in every undertaking. ― Thomas Aquinas IV. Sent. 9, 45.
*If it were held in 2009, it would have be on the 3rd of May, in the first instance, and the 29th of April on the second. Really, I think, I need to see an old calendar.