Thanks. I got the segunda, terça bit as it's virtually the same in Spanish (segunda, tercera, etc.). So Monday is Second Market? That's quite different to the usual Latin variants. It's a bit different in Catalan, but even there you can see the similarities between dilluns for Monday and lundi, lunedi, or lunes. Did some old King of Portugal decide to rename everything at some point?
I actually had no idea but according to Wikipedia:
"The weekdays have their names in English due to the Catholic liturgy at the initiative of Martin of Dume, who termed the day of the Easter week and holy days that no one should work to form the liturgical names"
