She is the patroness of First Communicants and many dioceses make use of her feast as a day to schedule First Communions and Confirmations.

[2] On 12 May 1333, the day of the vigil of the Ascension, she knelt in judora and the "Light of the Host" was reportedly witnessed above her head by the Sacristan, who then fetched the priest so he could see.

Immediately after receiving it, Imelda went back to her seat, and decided to stay after Mass and pray.

Her remains are kept in Bologna at the Church of San Sigismondo, beneath the wax effigy of her likeness.

The cultus of Lambertini has grown so popular that a confraternity for First Communicants has been established in her honor and the last Eucharistc Congress held in Bergamo passed a petition for her canonization.