Hello Bas, I am chipping in here coz I am also getting the same issue. Apologies for repeating myself here from the other post where you are helping me.
The date format in WP & WPI Plugin Settings are: d-m-Y
Following is how its getting displayed in the PDF:
Invoice Date: 06/01/2016 (d-m-Y – Correct format for me)
Order Date: 01/06/2016 (m-d-Y – Incorrect format for me)
I am running the following versions for your reference.
WooCommerce Version: 2.4.10
WooCommerce PDF Invoices: 2.3.20
Now, I have a test system running as a local instance in my PC and this issue is not present. The version numbers are…
WooCommerce Version: 2.4.12
WooCommerce PDF Invoices: 2.3.17
Did something change in the newer version of your plugin or is it something in the newer version of WooCommerce that created this?
Any help would be appreciated.
Thanks again!