Well generally when dealing with a company, 'end of the week' means end of the work week. A work week is usually Mon-Fri, however, if you want to pull teeth, the end of the week for several countries would be Saturday with Sunday being the first day of the week. This is true for Canada, Japan and the United States. For others, Sunday would be the last day of the week. Either way, I would of thought WC would consider Fri the end of the week, I guess I was wrong.