Question

I need help finding the second Wednesday of the year. Here is what I have done, but it doesn’t seem to work.

DateTime baseDay = new DateTime(DateTime.Now.Year, 1, 5);
int secondWed = 5 + ((12 - (int)baseDay.DayOfWeek) % 7);
DateTime fullDate = new DateTime(DateTime.Now.Year, 1, secondWed);

Answer 1

Based on the very good answer by Mark Ransom to How to find the 3rd Friday in a month with C#?. There is no looping here.

var year = 2011;
var firstDayOfMonth = new DateTime(year, 1, 1);
var daysUntilNextWednesday = DayOfWeek.Wednesday - firstDayOfMonth.DayOfWeek;
if (daysUntilNextWednesday < 0)
  daysUntilNextWednesday += 7;
var firstWednesdayOfMonth = firstDayOfMonth.AddDays(daysUntilNextWednesday);
var secondWednesdayOfMonth = firstWednesdayOfMonth.AddDays(7);

You can merge the last two lines into one for slightly better performance.