The Sanctuary of Notre Dame of Lourdes is open all year, 24 hours / 24. Access is free. Two periods punctuate their lives …
From April to October 22 to allow worship to celebrate Masses in all languages. One can also attend major celebrations like the international mass, the Eucharistic procession in the afternoon and the torchlight Marian procession every night.
From November to March many celebrations are also held every day such as masses, the Rosary, the Angelus …
Source lourdes-infotourisme.com