Oh, if the community permits me: can I also ask... does you week in the USA start with Sunday or Monday? I have had a conversation with an American woman a few years ago, and she told me it differs from person to person. E.g. she considers that a week starts on Sunday; her husband, on Monday.
In Russian language (in Russia, of course) the first day of any week is MONDAY. An absolute fact. Sunday is the last one.