Get the quarter number for the DateTime
//Octavalent Extension Methods //http://sdfasdf.codeplex.com/ //Library of extension methods for .Net create by Octavalent (www.octavalent.nl) using System; public static class DateTimeExtensions { public static int Quarter(this DateTime dateTime) { return Convert.ToInt16((dateTime.Month - 1)/3) + 1; } }