Anyway, the sentences are not meant to be true or anything. I had to translate from Spanish something saying that the horse speaks Spanish.
Depending on the country you are, the week begins on a different day. In Romania it begins on Monday, in England it begins on Sunday.
If I remember it right, the week begins on Saturday in Egypt. (and I would assume in many other Muslim countries too)
Biblically speaking, If Jesus rose from the dead on the first day of the week (Easter Sunday) , and the Jewish Sabbath is on the last day of the week (Saturday) then countries that are historically Jewish or Christian should start the week on Sunday.