getFulfillmentPreview timestamp format update for Japan
July 15th, 2025 by JackE_Amazon
The getFulfillmentPreview operation currently returns delivery dates as a UNIX timestamp in the Japan marketplace instead of the documented ISO 8601 format.
Starting August 27, 2025, getFulfillmentPreview will return all timestamps in ISO 8601 format.
Who does this affect?
This change affects sellers using the scheduledDelivery shipping speed category with the getFulfillmentPreview operation in the Japan marketplace.
What action is required?
If you modified your integration to handle UNIX timestamps, you must update your code to process the ISO 8601 date-time format.
We recommend implementing flexible date parsing that can handle both formats to prepare for the change to ISO 8601.