April 11th (since this is the day of her death and therefore the day that she took flight to heaven) however the Passionist Congregation celebrates her feast day on May 16 ---St Gemma is considered a lay Passionist--
See also the external link in the box below for more info.
The feast day of Saint Gemma Galgani is observed on April 11.
St. Francis of Assisi's feast day is on October 4. The feast day of St. Francis is on October 4.
Simon shares October 26 as a feast day with St. Jude.
The feast day of St. Brice is November 13.
March 7 is the feast day of St. Perpetua.
January 2 is St. Basil's feast day.
The feast day of St. Scholastica is on February 10th. She is the twin sister of St. Benedict and was a nun who founded the women's branch of the Benedictine order.
November 3 is the feast day of St. Hubert.
St. Ava's feast day is April 29.
St. Monica's Feast Day is August 27.
St. Lukes' feast day is on October 18
October 13th is the feast day of St. Edward the Confessor.
St. Linda (St. Ermelinda)'s feast day is October 29.