Is there any property to set the language for datetimepicker?
When displaying the calendar, that is - if I want the week days to be displayed in Spanish, for example
You can't change the culture, which contains weekdays names among other things, on a single control like the DateTimePicker, but at thread level.
You can change culture for thread:
System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo("es-ES");
System.Threading.Thread.CurrentThread.CurrentCulture = culture;
System.Threading.Thread.CurrentThread.CurrentUICulture = culture;