Being European, I prefer "Sunday in column 1" calendars.
Not for religious reasons or because I consider Sunday to actually be the first day of the week, but for practical reasons: It gives me a clearer understanding of the workweek. It moves Wednesday (in my language called "middle of the week") into the week's center. It deemphasizes the weekend for planning (and thus for planning work), making them better rest days.
Not for religious reasons or because I consider Sunday to actually be the first day of the week, but for practical reasons: It gives me a clearer understanding of the workweek. It moves Wednesday (in my language called "middle of the week") into the week's center. It deemphasizes the weekend for planning (and thus for planning work), making them better rest days.
YMMV.