[filmor]

Wednesday is called "Mittwoch" in German, which is a shortened form of "middle of the week". Only works if Sunday is the first day of the week, though the common convention is also having the week start on Monday. Confused me quite a bit as a child :)

[usrusr]

Middle of the working days part of the week, no need to go all American and make half of the weekend the beginning!

[galfarragem]

The same in Portuguese: Monday = Segunda (Second); Tuesday = Terça (Third) and successively till Friday = Sexta (Sixth).