I searched on the internet for a quick way to get the Quarter from a DateTime, but I didn’t really find anything useful, so I created this quick extension that seems to work great!  I just wanted to share this to save someone time so they don’t waste the same amount of time that I did.  I am thinking about putting together an open source library to handle many other things like this, what are your thoughts about this?

    public static class DateTimeExtensions
    {
        public static int ToQuarter(this DateTime dt)
        {
            int qtr = -1;
            if (dt.Month >= 1 && dt.Month <= 3)
                qtr = 1;
            else if (dt.Month >= 4 && dt.Month <= 6)
                qtr = 2;
            else if (dt.Month >= 7 && dt.Month <= 9)
                qtr = 3;
            else if (dt.Month >= 10 && dt.Month <= 12)
                qtr = 4;

            return qtr;
        }
    }