When importing records using the Salesforce Data Import Wizard, the import may fail if Date or Date/Time field values in the CSV file are not formatted to match the locale of the user running the import. This error typically appears in the import results:
INVALID_FIELD:Failed to deserialize field at col 0. Due to, '<Date/TimeValueFromFileHere>' is not a valid value for the type xsd:dateTime:<Date_Time_Field_Here__c> --
The Data Import Wizard uses the BULK API internally, which requires Date and Date/Time values to follow a specific format based on the importing user's locale settings in Salesforce.
To resolve the import error, set the Date and Date/Time field values in your CSV file to match the format that corresponds to the locale of the user running the import.
Step 1: Check the importing user's locale
To change the locale, click Edit, update the Locale field, and click Save. See Edit Your Language and Locale Settings for full instructions.
Step 2: Format your Date and Date/Time values correctly
Date and Date/Time values in the CSV must match one of the following formats:
Note
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