I had an unexpected blessed Holy Day of Obligation. I usually forget to check if the Cathedral is having a vigil mass as my parish only has a day time mass. I just note, no Holy Day of Obligation mass in the evening. As the feast of St Peter & St Paul was on a Friday, I checked out a neighbouring parish and was able to receive an overdue Sacrament of Reconciliation, attend mass and then pop along to their parish hall to watch a DVD about St Paul.
One day I might remember to check the vigil mass at the Cathedral, or failing that, must pray harder for lost sheep to come home so we have Holy Day of Obligation vigil masses in all of our parishes.