The Church has been celebrating the World Day of Migrants and Refugees since 1914. It is always an occasion to express concern for many different vulnerable people on the move; to pray for the challenges and increase awareness about the opportunities that migration offers.

In 2019, the World Day will be celebrated on September 29th. Pope Francis has chosen the theme “It is not just about migrants” to show up our blind-spots and make sure no one remains excluded from society, whether a long-time resident or someone newly-arrived.

The full letter can be found here, translated in many languages:
http://w2.vatican.va/content/francesco/en/messages/migration/documents/papa-francesco_20190527_world-migrants-day-2019.html