On a form, when you create an entry or modify an existing entry using a web service, you must specify the date and time in the following formats. This facilitates more accurate web service operation. 

Date and time formatExample

"yyyy-MM-dd'T'HH:mm:ssZ"

2016-01-19T09:55:50-0800 

"yyyy-MM-dd'T'HH:mm:ss"

2016-01-19T09:55:50

The following error message is displayed when you try to use any other date and time format in the web service:

ERROR (8957): The date format is invalid; Unparseable date:

Refer to the following code example of Create operation:

<soapenv:Envelope xmlns:soapenv="" xmlns:urn="urn:ABTestWS1"> <soapenv:Header> <urn:AuthenticationInfo> <urn:userName>Demo</urn:userName> <urn:password></urn:password> <!--Optional:--> <urn:authentication></urn:authentication> <!--Optional:--> <urn:locale></urn:locale> <!--Optional:--> <urn:timeZone></urn:timeZone> </urn:AuthenticationInfo> </soapenv:Header> <soapenv:Body> <urn:Create> <urn:Submitter__c>Demo</urn:Submitter__c> <!--Optional:--> <urn:Assigned_To__c></urn:Assigned_To__c> <urn:Status__c>New</urn:Status__c> <urn:Short_Description__c>Test25</urn:Short_Description__c> <!--Optional:--> <urn:Date_Time_Field__c>2016-01-19T09:55:50.111111000-0800</urn:Date_Time_Field__c> <!--Optional:--> <urn:Date_Field__c></urn:Date_Field__c> <!--Optional:--> <urn:Time_Field__c></urn:Time_Field__c> </urn:Create> </soapenv:Body> </soapenv:Envelope> 

Related topic

Registering a web service