Currently on all Merch Product Pages it says:
Date first available at Amazon.com: September 1, 2015.
This date of September 1, 2015 on all product pages is completely meaningless, as I'm assuming that was the date that Merch by Amazon started.
I believe it would be helpful to Customers to see exactly how long the shirt has been for sale on Amazon. And I know it would be extremely helpful to the Content Creator to see when that particular product was created. I know you can see the creation date on the Manage tab but it just seems to make sense to replace a meaningless date with the actual date the design was 'first available' for sale.