Dates are stored in SAP as strings with the format yyyyMMdd Lets say you have a web form with a textbox that has users entering a date in the format 12/25/2004 (MM/dd/yyyy). To Get it into SAP... string[] aryOnsiteDate = this.txtOnSiteDate.Text.Split("/".ToCharArray()); string onSiteDate = aryOnsiteDate[2] + aryOnsiteDate[0] + aryOnsiteDate[1]; yyyy MM dd Another example... to create a DateTime object from an SAP representation... DateTime dt = DateTime.ParseExact("20041225", "yyyyMMdd", null); ...or to create an SAP date string from a DateTime object... someDateTimeObject.ToString("yyyyMMdd");