I get some dates in the string in the AJAX post to the controller. code Modify public performance Partnering organization (Guide partner id, string alias name, string effective date, string end date) {partner partner = new partner (); Partner.PartnerId = partnerID; Partner.ExternalId = Alias name; Partner. Effective Date = Date Time Paras eXact (Effective Date, "YYMEMMD"), Culture Info Invoireticulture, Datetime Style. Non); Partner End date = date time Purse Axact (Expiry date, "Yemenammed", Culture Info. Inventions, Datetime Style. } The date coming from the customer side MM-DD-YYYY format for example 01/10/2014 (Explanation for adding 01 only In) / Oct / 2014) as the controller 10/1/2014 while trying to parse this error. The string was not recognized as a valid date time. Any help on this? OK, the client obtained from the format is mm / dd / yyyy . You should parse that way, such as yyyyMMdd : datetime. Purse Ecact (Effective Da...