Question

This should be easy, I think, but I couldn’t find it (yet) myself.

I need to know if these two values can be retrieved from the system’s environment and/or local settings.

I know that in my country (The Netherlands) these values should be:

• FirstDayOfWeek = Monday
• CalendarWeekRule = FirstFullWeek

But I don’t want to set a fixed rule for that.

Answer 1

You could retrieve these values from the DateTimeFormat object.

CultureInfo theNetherlands = CultureInfo.GetCultureInfo("nl-nl");
var firstDayOfWeek = theNetherlands.DateTimeFormat.FirstDayOfWeek;
var calendarWeekRule = theNetherlands.DateTimeFormat.CalendarWeekRule;

If you want to get these values for the current culture you could just use CultureInfo.CurrentCulture.DatetimeFormat.