Fiesta of Montaña Blanca 2019 from May 15 to May 24. Past days. Wednesday, May 15 Thursday, May 16 Friday, May 17 Saturday, May 18 Sunday, May 19 Monday, May 20 Tuesday, May 21 Wednesday, May 22 Thursday, May 23 Friday, May 24 You might be also interested in: Fiesta of Los Alares 2019 - Los Alares - 74 Kms.