In portuguese Tuesday is terca-feira which literally means third fair, in the article it's in an unusual form 3ª feira, the machine still managed to read it as Tuesday but left there the confusing 3rd. Still an amazing translation.
The portuguese "Terça" means both Tuesday and third, must be quite tricky to catch
if you change the wording from "a partir de 3ª feira da semana" to " a partir de Terça feira da semana" it does translate it correctly