Full date string methods

DateSuffixHelper.cs

public static class DateSuffixHelper
{
    public static string FullDate(DateTime date)
    {
        return date.ToString("%d") + DaySuffix(date.Day) + date.ToString(" MMMM yyyy");
    }
    public static string FullDateIncDay(DateTime date)
    {
        return date.ToString("dddd d") + DaySuffix(date.Day) + date.ToString(" MMMM yyyy");
    }
    public static string FullDateIncDayAndTime(DateTime date)
    {
        return date.ToString("dddd d") + DaySuffix(date.Day) + date.ToString(" MMMM yyyy - HH:mm");
    }
    public static string AbrDateIncDayAndTime(DateTime date)
    {
        return date.ToString("ddd d") + DaySuffix(date.Day) + date.ToString(" MMM yyyy - HH:mm");
    }
    
    private static string DaySuffix(int day)
    {
        switch (day)
        {
            case 1:
            case 21:
            case 31:
                return "st";
            case 2:
            case 22:
                return "nd";
            case 3:
            case 23:
                return "rd";
            default:
                return "th";
        }
    }
}