Overview

Amazon sellers encounter Error 13010 when a flat‑file upload contains sale‑end dates that do not match Amazon’s required format. The issue blocks promotional pricing from activating, potentially costing revenue during time‑sensitive events. Fixing the date formatting and preventing spreadsheet auto‑conversion restores the upload and keeps sales calendars on track.

Key Points

• Exact format required — Amazon only accepts dates written as four‑digit year, two‑digit month, two‑digit day separated by hyphens (YYYY‑MM‑DD); “2024‑07‑01” is valid, while “07/01/2024” or “July 1 2024” triggers the error.
• Upper date limit — The system rejects any end date later than January 18, 2038; a date such as “2039‑01‑01” will be flagged even if the syntax is correct.
• Chronology rule — The end date must be later than the start date; submitting “2024‑06‑01” as both start and end, or an end date earlier than the start, generates the same error.
• Spreadsheet auto‑formatting — Excel, Google Sheets, and similar tools often rewrite entered dates into regional formats (e.g., “2024‑07‑01” becomes “7/1/2024”), silently corrupting the file before upload.
• Text‑column safeguard — Setting the date columns to “Text” before data entry forces the program to keep the exact string you type, eliminating hidden conversions.
• Batch impact — A single malformed date can cause the entire file of hundreds of SKUs to be rejected, delaying all promotions in that upload.

How to Fix Error 13010

1. Set column type to Text — In the inventory template, select the column that will hold sale‑end dates, open the formatting menu, and choose “Text” as the data type. For example, in Excel you would click Home → Number → Text before typing any dates.
2. Enter dates in ISO 8601 format — Type each end date exactly as YYYY‑MM‑DD, including leading zeros for single‑digit months or days. A promotion ending on January 5, 2026 should appear as “2026‑01‑05”.
3. Validate calendar accuracy — Ensure the day actually exists for the month; “2025‑02‑30” will be rejected because February never has 30 days. Use a calendar or date‑validation tool to double‑check.