We are using the Submit Feed and type is POST_FLAT_FILE_FULFILLMENT_DATA to process the Amazon order. We create a flat file that contains all info including ship date. But when we hit Submit Feed API for orders then it gives warning message that is:
The ship-date or FulfillmentDate you provided (2023-02-14T07:00:00.000Z) was not between the order date (2023-02-12T00:00:00.000Z) and now (2023-02-14T06:23:27.042Z).
So, if script executed between 0:00 and 08:00, we got this error, in another time, this error does not occur.
Seems Amazon automatically makes +8 hours, but i can't find it on Amazon support.