You can watch the video tutorial, which provides a step-by-step guide through the process.
You can change the date format of your invoices by following the simple steps below:
Step 1: Open Simple Invoice from your Shopify store’s “Apps” section.
Step 2: Click the “Templates” in the Simple Invoice dashboard.
Step 3: Click on the “Formats” section, then select your preferred date format from the “Date Format” dropdown menu to use on your invoices.
Step 4: Please click the “Save” button to confirm your changes.