Yeah For St. Mary Magdalene! & A Memorial or A Feast?

St. Mary Magdalene at the Tomb
by Henry LeJeune
I've always used the words "feast" and "memorial" interchangeably for the days honoring our saints. I tend to prefer "feast," however and use it more frequently.  I honestly never knew until reading my St. Anthony Messenger magazine this month that there is a difference ...
St. Anthony Messenger - August, 2016

However, my copy of OSV's Catholic Encylopedia has assured me that using the word feast instead of memorial is not that bad of a crime ...
Catholic Encyclopedia