Overview

Error 90094 is a feed submission error that Amazon sellers encounter when a date field in their product listing data is formatted incorrectly. This validation error prevents your inventory feed from processing until the date values match Amazon's required format. Understanding how to resolve this common error can save sellers significant time when managing bulk uploads and feed submissions.

Key Points / What Sellers Need to Know

• Error trigger — This error fires when Amazon's system detects a date value that doesn't conform to the expected date format for a given data field in your feed file.
• Affected fields — Any date-type field in your inventory feed can trigger this error, including release dates, expiration dates, launch dates, and other date-based product attributes.
• Format requirement — Amazon requires dates to follow a specific format, typically ISO 8601 (YYYY-MM-DD), though the exact required format is specified in the error message itself.
• Feed rejection — Items with improperly formatted dates will fail validation and won't be processed until the formatting issue is corrected and the feed is resubmitted.

How This Error Works

When you submit an inventory file or product feed to Amazon, the system validates every field against its expected data type. For date fields, Amazon checks whether the submitted value matches the required date format. If the value doesn't conform — for example, if you submit "01/15/2025" when Amazon expects "2025-01-15" or if a non-date string appears in a date column — the system rejects that entry and returns Error 90094. The error message will typically identify which field caused the problem and what date format is expected, giving you the information you need to correct the issue.

Common Causes and How to Fix Them

The most frequent cause of Error 90094 is a mismatch between regional date formats and Amazon's expected format. Sellers using spreadsheet software like Excel should be particularly cautious, as these programs often auto-format date cells based on your computer's regional settings, which may not align with Amazon's requirements. Another common cause is copy-pasting data from external systems that store dates in non-standard formats. To fix the error, open your feed file, locate the date field referenced in the error message, and reformat the value to match the format Amazon specifies. Double-check that your spreadsheet application hasn't silently reformatted any dates before you save and resubmit.