How to calculate 2nd Friday of Month in C# [duplicate]

Answer 1

fully tested:

for (int mo = 1; mo <= 12; mo++)
{
    DateTime _date = new DateTime(yr, mo, 1);
    DayOfWeek day = _date.DayOfWeek;

    int d = 0;
    if (day == DayOfWeek.Saturday)
        d += 7;

    var diff = DayOfWeek.Friday - day;

    DateTime secFriday = _date.AddDays(diff + 7 + d);
    Console.WriteLine(secFriday.ToString("MM\tffffd\tdd"));
}  

Final results:

Month           Date
=====================
01      Fri     14
02      Fri     11
03      Fri     11
04      Fri     08
05      Fri     13
06      Fri     10
07      Fri     08
08      Fri     12
09      Fri     09
10      Fri     14
11      Fri     11
12      Fri     09