Feast: Our Lady of Fátima (Nossa Senhora de Fátima)
Date: October 13
Normally, I would include a brief history of the feast myself here but this is one instance where I feel that there are enough resources that by far say more than I can.
Sanctuary of Fatima
The Message of Fatima (Congregation for the Doctrine of the Faith)
Cause for the Beatification of Lucia dos Santos
NB: I must also add that there are various conspiracy theories that surround aspects of the apparitions at Fatima. Please do not allow yourself to be taken in by such people.